with the hotcams, you don't have the decompression assembly on your cam anymore. this, on the stock cam and some others, opens your right exhaust valve for easier starting. so, it may be alittle harder to start, but i didn't notice a difference. if the battery is in good condition, you will be fine.

 

we make 42-43 rwhp with a 416cc, 11:1 stg 2 hotcam R4 exhaust and biggun CDI(porting and valve job need to be very well done to make these numbers)I have seen these same parts put together by other engine builders and only make 30hp.

 

mine has the 10:8 piston in it. would stage 2 still be ok?

 

I have a JE 10.8-1 piston, Hotcam Stage II, ported and polished. You really have to keep the rpms up, or it starts chugging. If you keep the revs up, it has plenty of low end.

 

Ok, I'm going to have the stage II put it.. Is there anything else I should have replaced? (valve springs, rockers?)

 

Stk springs and rockers are fine with the Hotcam. Replace the timing chain while your at it though. Also cc everything or do an installed cc (you need to lift the front of the bike quite high to do this) and cut the head to give you 11-11.5:1, this will keep your bottom end.
We have run up to 12.6:1 static compression ratio on pump gas.

 

I'm having the local dealer put it in. I'm going to have the advanced timing key.
What is cc?

 

While I had mine apart, I put in new valve seals, new valve springs, a heavy duty timing chain, and heavy duty clutch springs.

 

CCing is measuring the cubic centimeters of the cylinder head, head gskt, and piston below deck volume, subtract the positive cc's of the piston dome (including valve relief's). This is your effective chamber volume. Then add this to your swept volume (Rad of bore x rad of bore x 3.14) x stroke. Add this number to your effective chamber vol, then divide by chamber vol = static compression ratio. If you make any power you will not be happy with the advance key, (you'll be on the limiter all the time) go with the Biggun CDI.

 

Hey Qfather. The what brand of valve springs did you use? Valve seals will be replaced. And is the heavy duty timing chain a necessity if so where do you pick one up at? Also is the Advanced timing and the Degree key the same thing? If not what is better? Remember this thing will have the 16 t on the front...

Anyone, what kind of horsepower do you think this thing would have?