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View Full Version : Exhaust tweaking (quite a few pics)


yorkie_chris
02-01-08, 07:40 PM
So, a while back, like a muppet I lost the front over a cattle grid on my way home from the Isle of Man (ironic eh...)
Resulting in my old can being scuffed and dented at the front, among other things.
http://photos-a.ak.facebook.com/photos-ak-sf2p/v108/78/86/574581600/n574581600_239408_4553.jpg

Ebay provided me with a new inlet plate for it for £15 along with some packing for a fiver. A16 roadnrace was the shop and they were really helpful.

So I set about with a drill removing the old rivets, then popped out the old endcap and tube, then pulled the packing out.
http://photos-600.ll.facebook.com/photos-ll-sf2p/v159/78/86/574581600/n574581600_534645_3448.jpg

I then marked out the soon to be stubby can to the length it was going to be and selected a suitably barbaric weapon of butchery.
http://photos-600.ll.facebook.com/photos-ll-sf2p/v159/78/86/574581600/n574581600_534647_4118.jpg
Shown here with a suprisingly clean hand, and the ever-essential brew (take notes here kids, don't worry too much about the sparks, a bit of iron in the diet's good for you)

After that, my mother nicked her camera back, so theres no pics of it going back together, but it was fairly easy, trimm the inner tube to length, slide packing into can and cut off excess, then slide inner tube in and persuade the new inlet cap in. Rivet in place (breaking as few 3mm drills as possible, you've got 2 to beat :-P)

http://photos-600.ll.facebook.com/photos-ll-sf2p/v159/78/86/574581600/n574581600_534648_4402.jpg
For comparison, top is the stubby, middle an ART pro series 2, bottom is stock.

Just for a good measure, I fitted a micron stainless race system at the same time with a mid-level link pipe.
http://photos-600.ll.facebook.com/photos-ll-sf2p/v159/78/86/574581600/n574581600_534656_1462.jpg
Yes I know my plastics are filthy, and my tyres don't match, but it goes like stink.

Veiw from the front:
http://photos-600.ll.facebook.com/photos-ll-sf2p/v159/78/86/574581600/n574581600_534649_4670.jpg
(the tax disc doesn't normally live there, I was fitting it at the time, and no way are my forks usually that colour)

Riding it, it seems louder, but I've fitted a degutted filter at the same time, so most of what I'm hearing is probably the induction snuffles and snorts.
Probably more due to the rejet than anything else, it now pulls like a gud 'un at 5000rpm, instead of stumbling.

I'm using mikuni jets, 152.5 main, 17.5 pilot (stock IIRC) with the needle raised 1 clip.
It's yet to go on a dyno to see how its fuelling, feels good though.

Chris

Edit:

It was NOT fuelling right, nowhere near. Now at 157.5 pilots, 1/3 of the filter taped over, with the needle at clip 2.

My forks are not usually that colour, usually far worse.

DarrenSV650S
02-01-08, 08:00 PM
Looks good :D thanks for sharing

Lissa
02-01-08, 08:06 PM
That looks really good, Chris. Well done:thumbsup:

yorkie_chris
02-01-08, 08:08 PM
Not as loud as yours, but give it a couple of weeks (1000 miles or so) and see what its like when the packing has settled/been blown out

Lissa
02-01-08, 08:10 PM
Not as loud as yours, but give it a couple of weeks (1000 miles or so) and see what its like when the packing has settled/been blown out

I remember we showered the guy behind us with red hot sparks when we destroyed the packing in our ART can:smt003

yorkie_chris
02-01-08, 08:15 PM
Cool :cool:

When's the next rideout anyway?

I want one now so I can go to at least one with a clean bike. :p

Lissa
02-01-08, 08:17 PM
To paraphase Field Of Dreams...................'if you post one, they will come':-D

Wideboy
02-01-08, 08:47 PM
what's that parachute on that back??

and all these excuses for a filthy bike tut tut

:-D

oh and nice job btw :)

yorkie_chris
02-01-08, 08:51 PM
Hey I ride mine instead of polishing it all day.

Anyone would think you had a harley :-P

Wideboy
02-01-08, 08:53 PM
Hey I ride mine instead of polishing it all day.

Anyone would think you had a harley :-P

well that well and and truly told me :)

Wideboy
12-07-08, 03:18 PM
i've drilled all my rivets out but cant get the end cap out, anyone know how?

yorkie_chris
12-07-08, 03:38 PM
Brute force. HTH :-D

You should be able to tap the sleeve out from the other side.

Wideboy
12-07-08, 03:42 PM
nope wont move :confused:

did you cut yours before you took the end cap off?

yorkie_chris
12-07-08, 03:42 PM
Nah but no reason why that won't work, just whack it in half with a chop saw

Wideboy
12-07-08, 03:45 PM
ok will do, i managed to move it slightly because the rivet holes arnt alined, but its bluddy tight, i think the tube in side that holds the packing back is holding it together

yorkie_chris
12-07-08, 03:47 PM
No they're just a very tight fit.

Wideboy
12-07-08, 03:48 PM
will report back in a min going to hack it in half

Wideboy
12-07-08, 04:05 PM
done it cheers chris will post pics up later :)

yorkie_chris
12-07-08, 04:07 PM
P.s getting the cap in is a bit of a bugger :-P Have fun.

Wideboy
12-07-08, 04:16 PM
hmm the tube is welded on one end, thats why i couldn't move it

Wideboy
12-07-08, 06:01 PM
all done, but choke is now stuck open :rolleyes: will sort that tomorrow