Rejetted and full exhaust system fitted
 

So I finally got my bike rejetted using Ivan's carb kit and my Arrow exhaust system is fitted. It's made a big difference to the running of the bike. She pulls so much more smoothly and the induction snort from the gutted K&N air filter is adictive :D

Only issue I've noticed is in fifth gear on full throttle around 8k rpm the bike seems to hesitate then surge a bit (tacho needle goes a bit erratic, I think I even bounced off the rev limiter once). I've also had a new clutch cable fitted, so am wondering if it may be a bit of clutch slip. May have to get that investigated at some point, but will see how it goes for now. Any ideas what else it could be? Other than that the bike has been transformed for the better :)

Re: Rejetted and full exhaust system fitted
 

Some pics:

http://i1361.photobucket.com/albums/...ps0d18fa9c.jpg

http://i1361.photobucket.com/albums/...ps377c74bf.jpg

http://i1361.photobucket.com/albums/...ps091178c1.jpg

So, after some research I have a feeling the hesitation / surging may mean she's a bit lean at the top end. Strange how it only happens in fifth gear at 8k though :smt017

Re: Rejetted and full exhaust system fitted
 

Looking good

Re: Rejetted and full exhaust system fitted
 

Thanks. Definitely better than stock :)

Re: Rejetted and full exhaust system fitted
 

Looks nice. How much did the system cost?

Re: Rejetted and full exhaust system fitted
 

Was just over £300 second hand. Was a bit more than I wanted to pay, but Arrow are similarly priced to M4 new, so was a fair (ish) price. Would have loved a Leo Vince system, but they are like hens teeth for the curvy.

Re: Rejetted and full exhaust system fitted
 

For the condition, that doesn't look like a bad deal. I assumed it was new! So congrats to you :D

Re: Rejetted and full exhaust system fitted
 

Gave her the beans a couple of times on the way to work this morning, and in between huge grins from the induction roar I still noticed she seems to surge a bit sometimes at the top end of the rev range. Have a feeling I may need to go up a size on my mains jets. No rush though as just want to enjoy riding her for a while :D

Re: Rejetted and full exhaust system fitted
 

I think you should start simple first and try adjusting the clutch cable. It could very well be a bit of clutch slip exacerbated by the power delivery.

Re: Rejetted and full exhaust system fitted
 

You may be right Ronnie, as when Patterson's fitted the clutch cable they did say it was a bit tight so may need adjusting if it slips. Will see if it stretches a bit over the next couple of days and if not get them to check it when I'm there next weekend.

Thinking about it, if it were lean I would imagine it would surge in every gear at the top of the rev range, but then again I'm no expert :p

Re: Rejetted and full exhaust system fitted
 

More air resistance at higher speed meaning you get more slip as the power kicks in hard in 5th? But when I have had slipping clutches it always seemed to happen in 1st and 2nd under acceleration.
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Re: Rejetted and full exhaust system fitted
 

:thumbdown:

Re: Rejetted and full exhaust system fitted
 

I'm no expert but whenever I've had clutch slip on the SV after cocking up adjustment, it's most prevalent pulling away hard in a high gear at low speed.

Think what it's like when you try setting off in too high a gear on a pushbike -if any weakness is going to give way in the drivetrain, it's then.

Re: Rejetted and full exhaust system fitted
 

Not always the case. Can happen at high rpm/high gear.

Re: Rejetted and full exhaust system fitted
 

Yeah but you'd expect it to happen in both instances, wouldn't you?

Could just be down to the tweaked power delivery/engine characteristics. I had a Mazda MX3V6 once that always felt like the clutch was slipping when you revved it to the limiter. It wasn't, it's just the little torque it had fell off at a certain point, so it kept revving but you didn't notice any increase in road speed.

Loved it though - under-rated little cars.

Re: Rejetted and full exhaust system fitted
 

I can tell you for a fact that it does happen this way (for me). I can't confess to having much knowledge but I had this problem exactly. It could be that I shift through 1st/2nd to use the torque so never got to the revs for the problem to show so perhaps it would have been present in all gears. But it was definitely happenning at higher RPM's in the range (not lower). But the only fix I did myself was to adjust the clutch cable at the levers and I've never had the problem since.