Question about Yamaha YZF-R15 Motorcycles
You don't say what bike you have but if it has a four stroke engine and you are serious about upgrading, then get a race cam for the bike.
Contact Web Cam Racing (1-951-369-5144) in California and they can fix you up. I estimate $300us. Add and shipping both ways. The web address is www.webcamshafts.com You would ship your overhead cam to them by Federal Express and they would modify the cam to your specifications then send it back. Neither you or I can give them degree angles for rise or duration or any other spec they may need, so you just need to tell them what type of racing you do (street, track, quarter mile etc ), and what you want from the cam, take off from the line, top end speed, torque, etc..
Don't get too radical with the cam. Go too far and the bike will only start with a car pulling you at 30 mph. I am serious. Also tell them any modifications you have made > air cleaner, sprockets, tires, exhaust etc.. ASK FOR THEIR RECOMMENDATIONS on the above and on ignition timing. You may have to get a different CDI to manage the more radical timing. Be sure to reseat the valves before installing the new cam.
Okay, I have given you my best. Do me a favor and don't kill yourself. You are playing with fire here. I am serious about that as well. I forgot to ask / mention, who will do the cam removal and re-install the cam? I strongly suggest the dealers service department so you have an experienced hand in the mix. Also, you will probably need to re-jet the carb. Ask the cam shop about that as well.
A “very helpful” rating for this answer? Thanks!
Posted on Aug 02, 2010
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Posted on Jan 02, 2017
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