Joined
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150 Posts
BACKROUND: Allright hey guys so I bought a cag pocket bike from a guy on craigslsit and I traded my mp3 player for it....haha. It wouldn't start, had no brakes, or a chain. When I took off the peice of crap black box aircleaner there was literally dirt clogging the whole carb.....like a pile in the intake part....not kidding. So I cleaned that out and got it started up, had a couple tuning problems, adjusted needles float, etc. Also I ran the clutch with 2 stock springs and a spring I found on my garage floor....lol. It was always engaged even at the lowest idle I could put it at so off the line It sucked but when it hit its powerband that thing ran! I also did the petcock mod, which helped with accel. and then I used spandex underwear(lol) as an airfilter and the increase in topend from this mod was insane! Not kidding if you have that black airbox take it off now! I took it a step further by removing my base gasket to lower squish, and raised my exhaust port, but when I put my piston back in, a ring cracked-_-
THE PROJECT: Ok so me being the illogical person I am instead of spending 5 bucks on replacement rings I ordered a big bore kit. I got Sam's stage 3 headkit. He is also tapering my carb and rejetting it, and blueprinting my engine.That comes out to around $165, which is a really good price for all of that.
I have a few questions though......Sam said that running 91 octane gas was about right for 45:1 ish ratio of oil... I thought I would be running 105 octane...... Should I be? EPR I hear you run 96 with that octane booster so I will try to get my hands on some of that.... I mean 91 octane with a 15:1 compression head just sounds kind of low....
He said a stock crank was good so thats what I will be running.
I will get some blackwidow reeds from pbu because they are $22 and I have heard great things about them unless some of you guys think that the polini single green reed mod or whatever you call it is better.
I also cut my exhaust in half on the expansion chamber so I can lengthen it by a couple inches(4?).
Here are all the parts I can think of that I should get
BW reeds
HP clutch springs
Aluminum 3 shoe stock clutch with holes drilled in it
7t 3rd bearing clutch support
68t rear sprocket for now
rocket key(HELP me on this one guys haha)
aluminum pullstarter
(So thats 100 bux+165 for engine not too bad)
I sent my engine to Sam(Boosted306) on monday a few days ago so I will keep you posted.
I am going to post pics of the whole build process unfortunately I lost most of the pics I took so far but I havent done much..... Well please make some recommendations on how I can make this thing better etc. Thanks for anything I appreciate the help and love learning about this stuff haha.
THE PROJECT: Ok so me being the illogical person I am instead of spending 5 bucks on replacement rings I ordered a big bore kit. I got Sam's stage 3 headkit. He is also tapering my carb and rejetting it, and blueprinting my engine.That comes out to around $165, which is a really good price for all of that.
I have a few questions though......Sam said that running 91 octane gas was about right for 45:1 ish ratio of oil... I thought I would be running 105 octane...... Should I be? EPR I hear you run 96 with that octane booster so I will try to get my hands on some of that.... I mean 91 octane with a 15:1 compression head just sounds kind of low....
He said a stock crank was good so thats what I will be running.
I will get some blackwidow reeds from pbu because they are $22 and I have heard great things about them unless some of you guys think that the polini single green reed mod or whatever you call it is better.
I also cut my exhaust in half on the expansion chamber so I can lengthen it by a couple inches(4?).
Here are all the parts I can think of that I should get
BW reeds
HP clutch springs
Aluminum 3 shoe stock clutch with holes drilled in it
7t 3rd bearing clutch support
68t rear sprocket for now
rocket key(HELP me on this one guys haha)
aluminum pullstarter
(So thats 100 bux+165 for engine not too bad)
I sent my engine to Sam(Boosted306) on monday a few days ago so I will keep you posted.
I am going to post pics of the whole build process unfortunately I lost most of the pics I took so far but I havent done much..... Well please make some recommendations on how I can make this thing better etc. Thanks for anything I appreciate the help and love learning about this stuff haha.