Sports Exhaust.

[TheHaza10]

I am looking to purchase a sports exhaust for my 05' speedfight 2 50cc, currently it has everthing standard on it but is de restricted and goes about 42mph, i was wondering will i need to increase the main jet size? and what size to if i buy either a Doppler S3R or a Leo Vince ZX.
Also what weight rollers would be best to use for these exhausts, and what exhaust would you recommend.

Sorry, its a lot to answer, any help please, thanks.

[TheHaza10]

* also im considering getting a gianelli extra.
not sure what the best one is for my speedfight ?

[N cee thirty]

just go on a speedfight forum and have a look for the best '' performance'' out of the pipes.

yes you'll need to increase the jet to even it up with the extra amount of fuel that will now be burnt

rollers usually come with the exhaust
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

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[TheHaza10]

yeah i looked around for speedfight forums but none of them are active really so

cheers.

[Anthony192]

I put a Doppler S3R exhaust on my Aerox and you will definitely need to upjet it. It came with rollers but you need to derestrict the exhaust yourself, just a case of knocking a few tack welds off and take a pipe thing out the silencer.

I bought mine from adrenalin ped stop and they were quite helpful actually, rung them up and they gave the right jet to go with it and it ran fine.
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CBT - 04/04/2009 Mod 1 - 26/07/10 Mod 2 - 02/11/10
Bikes - Yamaha Aerox 50 (Sold), Suzuki GSX 750F Katana

[stevo as b4]

I had a Doppler pipe on my SF100, and i wasn't that impressed with the quality or the loud noise from it TBH. I'd go for a quality chromed pipe like a high end Gianelli or Leovinci pipe.

Expect a fair bit of hassle and messing about/tweaking to get the jetting right, and the roller weights and clutch engagement speeds right for the pipe. It's possible but hard to get a race pipe equipt scooter to pull away as quick or quicker than std, and have decent acceleration, but it's sure as hell a bitch to get right. You might find that the std Variator is not up to the job and requires an aftermarket replacement, but try keeping the std one to start with at least.

All the above might gain you 4-6mph more, and faster acceleration for your trouble, if you get it spot on. Worst case scenario would be a bad set up that loses you performance over std, and makes more noise and with less reliability thrown in too.

[andys675]