SV650 Lump in a KR1S Frame (Courtesy of JanBros)

[mattSV]

When I was a nipper, I REALLY REALLY wanted a KR1s, or a RGV

JanBros is currently working on dropping a SV650 engine into a KR1S frame :shock:

How much would I like to have a go on that!

click here for photos etc (http://www.kr-1s.co.uk/forum/viewtopic.php?t=67)

JanBros - hope you don't mind me sticking the post up :wink:

[crusty]

jeez that man has some talent, :shock: that should be mental when its done!
i was deffo sold on the rgv too!

[hovis]

:shock: i wanted a kr1s too :shock:

[Luckypants]

What's a KR1S? :?: (Tin hat on)

[hovis]

this






http://upload6.postimage.org/128583/imagesCAFCJTQ8.jpg (http://upload6.postimage.org/128583/photo_hosting.html)

90's 2 stroke 250
:wink:

[gettin2dizzy]

stock kr1 had almost 60hp and weighed in about the same as the sv (iirc). so whats the real benefit of this?

[kwak zzr]

i'd have a go :D

[Grinch]

I had one... it was like a razor blade, topped out at 142.

If you rode it rihgt and due to its light frame you could **** over the early R1's as it was all about corner exit speed... Oh now I wants my old one back, and I even know where it is... lol.

[Grinch]

http://the-earth.ndo.co.uk/jpeg's/mbike1.jpg

http://the-earth.ndo.co.uk/jpeg's/kr1s%20and%20me.jpg

[rictus01]

interesting project although I would have used the opportunity to upgrade the front end as well, never the less good application.

Now a ss600 lump in a Buell firebolt chassis would be a project and a half.

Cheer Mark

[gettin2dizzy]

I had one... it was like a razor blade, topped out at 142.

If you rode it rihgt and due to its light frame you could p*ss over the early R1's as it was all about corner exit speed... Oh now I wants my old one back, and I even know where it is... lol.

faster than an sv then?

[Paws]

I had a kr1-s, really wish id never sold her :cry:

[Grinch]

I had one... it was like a razor blade, topped out at 142.

If you rode it rihgt and due to its light frame you could p*ss over the early R1's as it was all about corner exit speed... Oh now I wants my old one back, and I even know where it is... lol.

faster than an sv then?

Scared me a few times, once when I was going round a roundabout I forgot how low and small they are. I was almost laying in the road it as so far over.

Pain in the **** to look after though, bloody power valve servo things.

[Blue_SV650S]

stock kr1 had almost 60hp and weighed in about the same as the sv (iirc). so whats the real benefit of this?

It has to be a 'coz I can' job ... as there is no logic ;)

Neat little project and why not 8) ... but half of me does actually think that it seems a waste of a KR1-S :cry:

[gettin2dizzy]

my girlfriends dad has one. Its immaculate (better condition than my 3 month old bike :shock: ). He's thinking of trading it in for a daytona 675 though :D

[BILLY]

All that time and effort I would go for an USD front end as well 8) Looking good though!

[hovis]

my girlfriends dad has one. Its immaculate (better condition than my 3 month old bike :shock: ). He's thinking of trading it in for a daytona 675 though :D

how much will he get for it?

[jamesobrady]

Nice project....Id guess the sv lump will have more torque than the original?

[Alpinestarhero]

Mmm...2-smoke fumes early in the morning. Love it.

Mind you, KR1-S's blow up more often than RGV's, no?

I'd love and RGV, ut i dont think I could be arsed to maintain it..

Matt

[Alpinestarhero]

Nice project....Id guess the sv lump will have more torque than the original?

SV engine with more torque than a KR1-s 2stroke engine?

Yep 8) oooooooodles more torque, ooodles more useable power, oooodles easier to ride.

And a wheelie machine too, I bet! Looks like a bloody good project, I'd be interested to see how it performs up against a normal SV and a normal KR1-S

Matt

[Steve H]

:-k The SV engine in my old Aprillia RS125....................That could be interesting!
I heard somewhere that Aprillia are toying with the idea of putting their 450 vtwin
in the RS250 chassis. If so, I could be interested in that one! :love:

[northwind]

They'd better make the pistons last more than 4000 miles first :) Still, that'd be quite a bike.

[janbros]

Hi guys,

tnx fot the comments :wink:

some more explenation :

* I' ve been riding KR'1s now for about 10 years, and I just love them. they are so much fun , fun you can not find on 4-strokers (in my opinion - everybody has his own :wink: ). I bought my first one for racing in a non-license cometition and imidiatly I fell in love with it. on twisty roads, there is no modern supersportsbike that can realy kick it's ass (given the straights ain't too long, but I don't ride a bike for the straights 8) ) . my stroker has a tuned engine that produces about 72-73 BHP (original 60). when I stopped racing, I made a streetfighter of it, some pictures of it when it appeared in a Belgien magazine :

http://users.pandora.be/jannemie/KR1-SF/klein%201.jpg

http://users.pandora.be/jannemie/KR1-SF/klein2.jpg

given it's a 2-stroker they are quite reliable. just on the early models, the pin that holds the rings on the piston's came out, but then they redesigned the pistons and since they are not more/less reliable than an RGV .

* the weight is definitly less than an SV650 : an original KR-1S weighs about 128kg, compared to the SV650 : 169kg. that's a huge differrence 8)

* the front is an upgrade : they are ZX6-R fully adjustable forks, on a KR1, you can only adjust the spring compression


So why am I building this thing ?

* for riding solo, I'll always use my stroker, but when I'm riding with the misses at the back, if definitly is underpowered at lower rev's. espicialy when riding together with other more recent bikes. at one moment I actualy considered buying a second bike, but I would miss the KR-feeling too much, so I decided to make myself a reliable and evenly fast KR1.

* why an SV650-engine ? it had to have as much power as my stroker without needing too much attention, so a single cylinder was out of the question.
my first thought was a Ducati 748 engine, than a SV1000, but they are just too big. in fact, the SV650 engine is the only one that will fit I think (exept maybe a Honda NTV/transalp engine, but that's just good enough for ploughing :lol: )

* and yes, I wanted to see if I can do it :D


ooh, and it definitly isn't a waste of a KR1, since I had 2 spare frames lying in my garage :wink:

and for the second frame , I also have plans when this one is finished : I'm gonna make a track-bike of it with a KX500 engine 8)

[Alpinestarhero]

Nice one dude, its a really cool project. Get some vids when its done on YouTube or something so we can all watch!

Matt

[r4ce_e3nd]

:lol: ge gaat nog wereldberoemd worden

[dclifford]

I went to buy a KR1S. But the engine was under the guys stairs. Turned me off it. Wanted 1000 euro. I picked up a running VFR400(NC24) for the same price.
He still has it, I see it every day I pass by. The frames and fairing were in very good condition. He even had a set of polished wheels extra.
If I had the skill/time I would live to put an SV engine in the KR1s. Good work janbros.

[janbros]

for those who are still interested :

it's alive (http://nl.youtube.com/watch?v=nrl5mee9LMk) :D

hoping to get it on the road next spring for testing.

[Grinch]

Nice, I'll have to have a look when I'm not at work.

[zadar]

I heard somewhere that Aprillia are toying with the idea of putting their 450 vtwin
in the RS250 chassis. If so, I could be interested in that one! :love:
why wait for them.and 550 is better :)

[embee]

There's a really nice frame for a SV650, looks like
http://i258.photobucket.com/albums/hh268/Hi-vis/sv650frame.jpg

[vzzzbuxt]

sweet- man somepeople have far to much time!!!

it has got me thinking of not project-ing the sv650 and just trying to follow a similar path and shoehorn the sv engine into a nsr250 frame... g-g-g-g-g-g-g-g- grrrrrrrrrrrrrrrrrrr... but i guess i must ask myself- do I indeed even have that kinda time?

[vzzzbuxt]

but seriously- what the f~*k were suzuki thinking about when the did the swingarm????:smt067:rant:

There's a really nice frame for a SV650, looks like
http://i258.photobucket.com/albums/hh268/Hi-vis/sv650frame.jpg

[zsv650]

whats wrong with the swing arm holds the wheel on doesnt it.

[yorkie_chris]

They were thinking: £1.50 ... £1.51 ... £1.52 ... STOP! That's plenty!

Some people don't like fact that it's not some posh banana-arm jobby, but it handles power of SV fine without flex.

[Tim in Belgium]

I love the quality of the welding on the curvy swigarm, especially on the inner brace between shock and tyre.....

The pigeon on the production line must of had guts of steel to produce that.

[Tim in Belgium]

for those who are still interested :

it's alive (http://nl.youtube.com/watch?v=nrl5mee9LMk):D

hoping to get it on the road next spring for testing.


Looking good, are you going to fair it?

[thedonal]

Nice work.

But this and another thread has got me thinking-

Hmmm- SV650 Curvy with a single sided swingarm ,underseat exhaust and new bodywork.

I may not sell the SV when I eventually get a new bike....!

[yorkie_chris]

All excess weight! :-P

[zsv650]

those 595 single swingarms are really really reaaalllly heavy though.

[Lozzo]

What's a KR1S? :?: (Tin hat on)

Unreliable late 80s pile of Kawasaki 2-stroke rubbish. There are loads of immaculate KR1 and KR1-S rolling chassis around, because the engines lasted about 5 minutes.

I owned one, after the third set of pistons and barrels the engine was dumped wholesale in my wheelie bin, and a spare RD350LC F1 engine I had kicking around went in instead. It's still going after 9 years like that.

[Lozzo]

Scared me a few times, once when I was going round a roundabout I forgot how low and small they are. I was almost laying in the road it as so far over.

Pain in the **** to look after though, bloody power valve servo things.

Did your powervalves snap the ends off, or were the linkages all worn out?

[pencil shavings]

So what is the resulting bike like compared to a stock SV?

[janbros]

So what is the resulting bike like compared to a stock SV?

I don't know :D

I've never ever ridden a SV650 when I bought this engine .

@ Lozzo : if you had an early KR, then yes, they were unreliable because the pins that keep the rings in place came out. They redesigned the pistons and after that they are as reliable as a 2-stroke can be and as reliable as an RGV , RD or any other. In fact, it might be the best 250 2-stroke ever built for road bikes, it's certainly much more fun than all the others and holds the world-landspeedrecord for production 250 bikes :cool:

[arenalife]

stock kr1 had almost 60hp and weighed in about the same as the sv (iirc). so whats the real benefit of this?

KR1S - 131kg

SV650 - 165kg

[Grinch]

Did your powervalves snap the ends off, or were the linkages all worn out?

I had a C2 and the electric motor seized on the powervalves, I was able to pull it all apart though and fix it, bit of a job though doing it blind.

[Lozzo]

KR1S - 131kg

SV650 - 165kg

The SV engine probably weighs more than 35kg more than the 'made from recycled coke cans' KR-1 lump, so there's no real advantage.

[janbros]

The SV engine probably weighs more than 35kg more than the 'made from recycled coke cans' KR-1 lump, so there's no real advantage.

this will be one off 4 bikes I have/am making. a have a KR-1S streetfighter for the road when I drive alone, this one for driving with the misses at the back, a KR1 with KX500 engine (I already have all the parts, but not the time :mrgreen:) for trackdays and a ZXR400 with a ZZR600 engine, also for trackdays. I love 2-strokes, and nothing in the world can cure that, but I just want a reliable alternative for when it does go wrong.

The real advantage is that (normally) this one always runs, is about as fast as an original KR1 and has enough torque to drive "cofortably fast" with the misses at the back. It will still feel/ride like my beloved KR1 (small bike that steers every where you want it to go just by thinking it ) and it is much more fun building this one then just buying an SV that you can see at every corner (not that it is not a good bike, it is just to ordinary for me)

[Lozzo]

I agree the handling and braking of the KR-1 is 100 times better than any stock SV and anything has to look better than a curvy :D. I was just thinking that the KR-1 with an SV engine will weigh as much as a standard SV because the engine is so much heavier. The KR engine is so light that I thought half of mine was missing the first time I took it out of the frame.

I'd love to get my old Yamasaki KR-350 YPVS back one day

[janbros]

just make one yourself :cool:

[Alpinestarhero]

The KR chassis is alot shorter than the SV chassis though isnt it? so it might feel lighter when you're flicking it through a set of twisties on a warm summers day

mmm, summers day

[janbros]

The KR chassis is alot shorter than the SV chassis though isnt it?

everything on the KR is "a lot" compared to th SV : shorter, lighter, smaller, ...:D

[Alpinestarhero]

How close to completion is the project then janbros? It sounds like the end product will be brilliant; a usable, forgiving motor in a tiny sweet chassis :mrgreen: what else will you add onto the bike? any suspension and brake upgrades?

[Lozzo]

just make one yourself :cool:

I already did back in 1999. Stupidly sold it to a friend who won't sell it back to me. I don't have the time to build another one, there are 5 other bikes that need sorting before that can even be a dream.

[janbros]

How close to completion is the project then janbros? It sounds like the end product will be brilliant; a usable, forgiving motor in a tiny sweet chassis :mrgreen: what else will you add onto the bike? any suspension and brake upgrades?

make exhausts in INOX (with the double Z1000 cans :cool:, I love em although they weigh very much :(), find a place for the oil-cooler and powercommander, fit another front fork (CBR600RR '04), fit Brembo calipers on them (from a Ducati SPS :cool:) with 320mm discs and then I can test it to see if everything is ok.

finishing the looks will be for next winter

[northwind]

This thread reminds me of this thread:

http://forum.svrider.com/showthread.php?p=1354301#post1354301

You guys should get together, you could make one whole SV :mrgreen:

[janbros]

This thread reminds me of this thread:

http://forum.svrider.com/showthread.php?p=1354301#post1354301

You guys should get together, you could make one whole SV :mrgreen:

nice :cool:

hopefully next year I can present pictures off a similar project. waiting on my attic : KR-1S frame, KX500 engine, ZX636 '04 forks, ZX6 '02 öhlins rear suspension :-D
Have them for 2 years now, but I wont start it before this one is running fine

[yorkie_chris]

That will be pretty mad :-D

[janbros]

some pictures off the bike as it is at the moment :

http://users.telenet.be/jannemie/KR1-SV/0143.JPG

http://users.telenet.be/jannemie/KR1-SV/0142.JPG

http://users.telenet.be/jannemie/KR1-SV/0141.JPG

[squirrel_hunter]

Interesting exhaust... tell me more?

[yorkie_chris]

Looks like custom job with Z1000 end cans.... why would you use those?! They weigh as much as the motor!

[Roberrrrt]

They do look niiiiiiice though!

that headlight on the other hand.....errmmmmm.....

[janbros]

Looks like custom job with Z1000 end cans.... why would you use those?! They weigh as much as the motor!

they are Z1000, and I used them because I just love them :cool: . they are the most beautiful original exhausts ever buid (well, that's my opinion :D )

you have to remember why I build this motor : it's main purpose is for driving with my wife on the pilion (for having a blast on my own, I have my stroker), so weight/performance and all off that stuff ain't important. just building a reliable bike that still feels like my KR1S, is almost as fast and looks like I want it to look ;)

[squirrel_hunter]

Is the left hand pipe plumbed in and did you fabricate the exhaust join yourself?

[janbros]

Is the left hand pipe plumbed in and did you fabricate the exhaust join yourself?

don't know what you mean with "plumbed in" ?

it you want to know if it just fits on the original SV-exhaust, the answer is "I don't know" ;)

everything on this bike I did/made :cool: so that include's the exhausts. only bits I used from the original SV-exhaust are the parts that bolt onto the cylinders. it's a 2-in-2 btw, both pipes are completly seperate.

[squirrel_hunter]

plumbed in - is it connected? But you've answered that now.

As its a 2-in-2 I'd love to see more of it. Why did you decide to do it that way? Got to say I do like the Z pipes, nice work.

[janbros]

Why did you decide to do it that way?

seams I don't have any close up pictures off the exhausts.

because I want each side to have an exhaust can (looks better than just one), and because it's easier to make them seperate in stead off them meating each other somewhere .
And I don't mind loosing a few horses (if, when it's finished, I'll dyno it), it's not build for being the fastest bike ;)

[janbros]

done a +500km trip yesterday and I'am very pleased :D

engine runs much better on higher revs. with the injection, above 8.000 there was not happening much , but this was probably due to the fact that I didn't have an airbox, and so the IAT and IAP sensors didn't give the right information, they where just fitted next to the K&N filters.

anyway : now I can really appreciate this engine - it ain't as fun as a 2-stroker off corse :cool: - but it's got enough power to have fun on twisty roads and a fairly good overrev. just missing the "kick in the bud" a stroker gives you when it hits the powerband .

[thefallenangel]

the 2 stroke kick will never be replaced but i enjoy the V-twin engine in a different way. Hats off to you Jan, i seen this on the KR1S forum when i had one too and it's a one off which would be brilliant for most people. Have many fun miles on her.

[janbros]

well , it's been a while , but it finaly has happened : the bike is finished :smt041

http://users.telenet.be/jannemie/KR1-SV/0200.jpg
http://users.telenet.be/jannemie/KR1-SV/0201.jpg
http://users.telenet.be/jannemie/KR1-SV/0202.jpg
http://users.telenet.be/jannemie/KR1-SV/0203.jpg
http://users.telenet.be/jannemie/KR1-SV/0204.jpg
http://users.telenet.be/jannemie/KR1-SV/0205.jpg

[andrewsmith]

Wow!

Gizza go mister :mrgreen: