49cc R6 bike. I have just got done installing all my new parts: headstrong kit, stage two kit, 60 tooth sprocket, rocket key. i cant seem to get the darn thing running good. i took it for a ride and got it up to about 45 MPH. went back to the house and let the bike sit for a minute, while running, and then went to take it for another ride. had it opened up all the way and could not get over five MPH. it seems to be bogging down. Is this because i don't have it tuned right?
Sounds like you might be overheating it,do you let it idle for long periods of time? its going to get hot during the break in period,you need to heat cycle it a couple time brfore it will loosen up.I wouldnt let it idle for long amounts of time either,they need air moving through the fins of the motor to keep em cooled.
49cc R6 bike. I have just got done installing all my new parts: headstrong kit, stage two kit, 60 tooth sprocket, rocket key. i cant seem to get the darn thing running good. i took it for a ride and got it up to about 45 MPH. went back to the house and let the bike sit for a minute, while running, and then went to take it for another ride. had it opened up all the way and could not get over five MPH. it seems to be bogging down. Is this because i don't have it tuned right?
stage two kit? what's that? rocket key's and high compression engines are not a good combo, now that you have a higher compression and a better shaped combustion chamber, the combustion flame speeds up enough already. The rocket key is just too much, either sell it or see how far it can fly. Another area you should check is the head stud/screw tension, they need to be red tightened after a bit cause the become loose.
Also your jetting would be all over the place, in cases like these it's best to start too rich and work lean, that's the safest advice i can give over a forum anyway.
stage two kit? what's that? rocket key's and high compression engines are not a good combo, now that you have a higher compression and a better shaped combustion chamber, the combustion flame speeds up enough already. The rocket key is just too much, either sell it or see how far it can fly. Another area you should check is the head stud/screw tension, they need to be red tightened after a bit cause the become loose.
Also your jetting would be all over the place, in cases like these it's best to start too rich and work lean, that's the safest advice i can give over a forum anyway.
i have the same bike..and had the same problem. embarassingly enough...my carb was loose from when i installed my air filter and vstack. i thought i had it all tight and had added some washers so the screw would tighten all the way down, but i just had to retighten them after a few rides. i also had lightend my CVT, and put one of the weights back in, because the whole wide up and not going, seemed like the CVT was slipping.
i have the same bike..and had the same problem. embarassingly enough...my carb was loose from when i installed my air filter and vstack. i thought i had it all tight and had added some washers so the screw would tighten all the way down, but i just had to retighten them after a few rides. i also had lightend my CVT, and put one of the weights back in, because the whole wide up and not going, seemed like the CVT was slipping.
I have the same prob but I think he hit it right with the rocket key is too much for it after the headstrong kit but I know longer have my stock key. any one want to trade?
so why will it be too much for the bike.....bogging is normall cause by the fuel mixture not being right............unless i am wrong....
Yes, fuel mixture can cause bogging, so can laxitives
The rocket key advances timing,right? With a high compression central dome head you pack extra fuel/air into a tighter area under a greater pressure with less distance for the flame to travel, this has a similar effect as advancing the timing, it takes less time for the fuel/air to burn, right?
Now imagine if you had both, the gasses would be combusting too early causing some serious heat and pressure, you'd hear strange knocking noises As the piston tries to go up but is forced down and slaped against the bores, you'd get extra heat and no doubt the pressure would probably stretch or pull the head bolts out....btw what cause the bogging??
*Early spark make bang early *Faster fire make bang early *Faster fire and Early spark make engine go bang bang!
Can't Keep It Running!!!!!!!!!!!!!! 
