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Discussion Starter · #1 ·
Before I start this project I was wondering what performance modifications people do to squeeze a bit more then the stock 17hp I was looking at doing the dual carb setup with pod filters and high flow mufflers, how much power do y’all think I’ll gain? What jetting should I run as a baseline? Is there more I can do? Does porting the head yield much power? The TS100 is a bit lighter and has an 18 inch tire, recommendation on gearing?
 

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1985, 86 CMX250C, 81 CM200T, 74 CL360, Invisible to cages, treat them accordingly. Avoids Road RAGE!
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1st, anything can be modified to work.
2nd, although harder to find, I'd search for a destroyed 1st gen Rebel for the engine, because it already has 4 to 5 more HP to start out, even with a single carburetor. The dual only adds 1 additional HP to the 1st gen, so not a very cost effective method for gaining power.
Please don't do this with a running 1st Gen Rebel. They are already great as designed.
 

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Discussion Starter · #3 ·
It's a 2005 rebel engine id only be paying 200 for it and I know it'll work I'm just trying to get advice, you only answered one of my questions and told me it wasn't effective.... lol
 

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Pod filters and mufflers don't add any power to a Rebel engine and can reduce it. If you have the knowledge and skills, you can make some internal engine mods (crankshaft, etc.) that will slightly increase horsepower.
 

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Right on! How could I forget the most important Rebel horsepower booster?!?!??? Should also have mentioned full time nitrous boost. :oops:
 

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It's a 2005 rebel engine id only be paying 200 for it and I know it'll work I'm just trying to get advice, you only answered one of my questions and told me it wasn't effective.... lol
That is a great price for an engine! If you don’t do the project please post the engine for sale here!!!
 

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Welcome to forum .You can get a large improvement with head porting and upgrade the cam and with twin carbs and advance the timing 5 degrease and high output coils i have done it all to my 250 and have close to 30hp
 
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1985, 86 CMX250C, 81 CM200T, 74 CL360, Invisible to cages, treat them accordingly. Avoids Road RAGE!
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Not fair! Australia had the twins right from the factory! ;) :LOL:
But the New cams & especially the head porting. And the changed timing, to more closely match the 1st Gen design.... I can definitely see how that would help increase 2nd generation power.
Thank you for posting wjmrty. That It gives me something to think about....:unsure:
 

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Ive mentioned in other posts, the Ricks motorsport CDI, K&N filter, & NGK Iridium plug combo will offer noticeable performance improvement in throttle response and extra rpms on the top end.
 

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And how did you measure the performance improvements? Did you have a tach to document the difference in rpms? Butt dynamometers don't count.
 

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And how did you measure the performance improvements? Did you have a tach to document the difference in rpms? Butt dynamometers don't count.
Fair enough.... I got my bike with a broken speedo, so I put an aftermarket universal 4 in one digi mechanical speedo which features a tach. I cant tell you how accurate it is or isnt, but I can say I saw more RPMS on the top end. No idea if its 1k extra like perf cdi's advertise, but extra nonetheless. It was also more eager to reach those extra rpms. I also a-b tested the iridium plugs against the stock ones and had a noticeable difference in throttle response. The K&N air filter adds a cool throaty intake sound @ midrange RPMS too! Altogether, for less than $200 the gains are worth it!
 
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