View Full Version : SV700 - Sv750 kit and fitting
Anyone ever fitted the kits themselves? Would you say it is something that someone with no knowledge but a bike that can be laid up easy do in time and with a bit of advice?
Clearly I've not done this. But I would imagine the bores will have to be sent to a pro to be done right, other than that it's Haynes manual stuff to replace the pistons, bores & heads?
Intresting to know though, happy to be corrected on this!
Jambo
I was wondering how this would work, I take it then you might have to remove the heads and send them off to someone.
Could pick up a spare engine from fleaBay, do the work, then flog the original back. Saves on down-time,.
Dangerous Dave
30-07-08, 11:50 AM
The full kit can be done quite easily with the aid of a Haynes (or similar) manual for the lesser experienced.
You won't get much of a gain with just a rebore kit, I personally don't advise just this to be done as it costs a lot for not much of a real gain. Saying that it costs more than an SV to get a significant gain (see signature).
Edit: Not 100% sure but I don't think the full kits are still available.
ThEGr33k
30-07-08, 12:48 PM
Really dave!? Im surprised at that. With the Falco 100mm kit you get a lot for just that mod, though you need a PCIII obviously.
northwind
30-07-08, 01:07 PM
The actual swap's simple enough, if you can remove the heads- and you probably can- then you can swap the barrels. Obviously you need a pro to bore them out, and it needs to be done spot on.
Personally I decided not to, because it adds stress, weight, and makes the liners thinner... Not that it suddenly becomes a time bomb but those are all things i can live without for the benefit. But it does depend on what you do with the bike, there's someone on here that has the wiseco 700cc kit on their bike and says they only ride the mids- that'd be great, because it's less stressed and the 700cc kit gives a nice midrange boost.
A little searching and Wiseco UK seem to offer a 677cc and 694cc kit all this for $360, and that is dollars.
PDF is here (http://www.wiseco.co.uk/_private/07/SuzukiCycleStreetOverbore.pdf)
As there is stuff there for older bikes I imagine they can make it up might just be a little lead time to it.
ThEGr33k
30-07-08, 01:34 PM
You need to find somewhere to bore out for you. What size piston is used for 700 and 750 kit?
The pdf said -
3.268” or 84.00mm
3mm oversize
Stroke - 62.6mm
For 694 CC kit.
ThEGr33k
30-07-08, 01:46 PM
The pdf said -
3.268” or 84.00mm
3mm oversize
Stroke - 62.6mm
For 694 CC kit.
Man those 750 kits must make the cylinder walls REAL thin... unless they play with stroke... which i doubt, that would mean most internals replacing...
There is a company called Boretech near Henfield (about 35-40 mile from Pompy)that should be able to sort the rebore out for you and they probably be able to get Weisco pistons as well, I know they could for mx bikes.
I've give Weisco a e-mail, but yes thats handy to know.
No probs.let me know how you get on as I am considering going down this road myself at a later date. It is advisable to get yourself a billet crank though, as the crank will become the weak link. I have a spare engine now so am definately considering having it bored out.
Well I have 2 bikes... :-D
I thought it was a legal requirement that bikers had to have two bikes....
or at least thats what I tell my missus lol.
Dangerous Dave
30-07-08, 04:20 PM
Man those 750 kits must make the cylinder walls REAL thin...
...that would mean most internals replacing...
Yeap
It is advisable to get yourself a billet crank though, as the crank will become the weak link.
Spot on there 'rowdy'.
Dangerous Dave
30-07-08, 04:22 PM
Really dave!? Im surprised at that. With the Falco 100mm kit you get a lot for just that mod, though you need a PCIII obviously.
You get a little more mid range with the 700 and 750 kits, but not much when you compare them with the same method on other bikes. It takes a lot of work and money to build a decent 750cc SV engine.
first weak link after 700 pistons are rods.you should use stronger ones.
boring stock cylinders to 3mm over will leave sleeves thin.in hard use they will get out of round or/and have hot spots.
2mm over is most I would do.
Dangerous Dave
31-07-08, 12:16 PM
first weak link after 700 pistons are rods.you should use stronger ones.
boring stock cylinders to 3mm over will leave sleeves thin.in hard use they will get out of round or/and have hot spots.
2mm over is most I would do.
I'm in 100% agreement with you Zadar.
ThEGr33k
31-07-08, 12:28 PM
I'm in 100% agreement with you Zadar.
Surly though the new pistons can weigh as much as standard if not less? That should make it fine... Unless you mean they cant take the extra push not the extra pull extra weight causes? :confused:
northwind
31-07-08, 12:44 PM
Nah, all of the big-bore pistons are heavier than stock. You'd think a well-designed and manufactured forged piston could be lighter despite the extra crown size.
Back when I was going to bigbore mine, I had the thought of speaking to one of the various piston specialists and seeing if a lighter piston was on the cards... Even the high comp, standard bore pistons for the SV are heavier than standard I think, which is a bit nuts. But I never bothered in the end.
ThEGr33k
31-07-08, 01:00 PM
Nah, all of the big-bore pistons are heavier than stock. You'd think a well-designed and manufactured forged piston could be lighter despite the extra crown size.
Back when I was going to bigbore mine, I had the thought of speaking to one of the various piston specialists and seeing if a lighter piston was on the cards... Even the high comp, standard bore pistons for the SV are heavier than standard I think, which is a bit nuts. But I never bothered in the end.
Man that's crap! Sorry for mentioning it again... but the 100mm pistons for the Falco are a little lighter...
northwind
31-07-08, 01:01 PM
Yeah, either the big bores on the market are heavy, or the SV stock pistons are light, I have no clue which is which.
Well I might be getting hold of some 700 pistons, so something to do in the winter me thinks. :-)
Will need to find out more about the pistons and the bore that I need, though even if I do go 3mm on it then its not going to be on the main bike, this will be the special one. Oh the fun, it seems as I get older I enjoy the fiddling more.
Grinch, eat less pies. You will then go faster :)
Grinch, eat less pies. You will then go faster :)
I dunno, I'm slow and I weigh sod all....:rolleyes:
Grinch, eat less pies. You will then go faster :)
No I need to eat more pies and keep the same speed. :D
northwind
31-07-08, 04:04 PM
I dunno, I'm slow and I weigh sod all....:rolleyes:
Me and my bike have both been on a diet, but if we go any slower we'll go backwards :cool:
Dangerous Dave
31-07-08, 05:24 PM
Nah, all of the big-bore pistons are heavier than stock. You'd think a well-designed and manufactured forged piston could be lighter despite the extra crown size.
Correct, and yes you would think they were.
Even the high comp, standard bore pistons for the SV are heavier than standard I think, which is a bit nuts.
Correct again.
Man that's crap!
It true.
either the big bores on the market are heavy, or the SV stock pistons are light
Stocks are quite light, well they are lighter than what I would have expected.
Dangerous Dave
31-07-08, 05:26 PM
Well I might be getting hold of some 700 pistons
Please avoid Holeshot!
of the shelf aftermarket pistons are around 10-15 grams heavier.
stock busa pistons are 17 grams lighter.
there are some aftermarket ones that can be lighter.
weight is not only issue with aftermarket ones.
Dangerous Dave
31-07-08, 05:41 PM
stock busa pistons are 17 grams lighter.
Thanks Zadar, that I didn't know!
that would be complete assembly,piston,rings,pin,clips.
Dangerous Dave
31-07-08, 05:45 PM
that would be complete assembly,piston,rings,pin,clips.
Ta.
yorkie_chris
31-07-08, 06:43 PM
of the shelf aftermarket pistons are around 10-15 grams heavier.
stock busa pistons are 17 grams lighter.
there are some aftermarket ones that can be lighter.
weight is not only issue with aftermarket ones.
So with the busa pistons, does that mean you need to work on the bottom end? i.e does just dropping them in cause balance issues?
yorkie_chris
31-07-08, 08:59 PM
no,you don't need to.
zadar I feel guilty for picking your brains :notworthy:
Curiosity question: is this because the weight difference is small or because of inherent balance in the V-twin?
Serious question: what hone do you need to take out of the SV bore for the busa pistons?
if you want to be serious about it and building race motor you would re balance whole motor again.it is correct way to do things.
in real world difference is not great enough to make it necessary ,you can get away without doing it.
you need to hone it out until you get proper clearance.clearance can be found in manual.there is range,pick number in there and go for it.engine builders pick number that they believe will give them best clearance for intended use.and you can't find 2 of them to agree :)
Please avoid Holeshot!
Pardon?
Dangerous Dave
01-08-08, 02:00 PM
Pardon?
Inferior parts and not always what is advertised.
sv_rider1990
02-08-08, 07:53 AM
Dave your SV's now an 800???? :D:D!!
Inferior parts and not always what is advertised.
I'm pretty sure its not going to be inferior stuff.
northwind
02-08-08, 10:47 AM
If you buy the wiseco kit it'll be the exact same as it will be everywhere else
Dangerous Dave
02-08-08, 12:11 PM
If you buy the wiseco kit it'll be the exact same as it will be everywhere else
Yes, but it isn't always the Wiseco components in the kit. We have had issues with these kits and got know where with Holeshot, contacted Wiseco and they sent the correct pieces that should have been in the kit but were replaced with other parts!
Dangerous Dave
02-08-08, 12:12 PM
Dave your SV's now an 800???? :D:D!!
Yeap
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