Anyone use a flywheel advancer or cdi box

[StrokedTater244]

Well its my understanding that you pull the flywheel off with a flywheel puller and take out the old key, put in the new one, replace the flywheel and tighten the nut. bam.

Tator and Best, yes, fuel does have a cooling effect but you right it was pretty bad and im not sure simply adding more fuel would have fixed it on the day. I would have needed to turn the timing back to stock. Unfortunately, in the middle of nowhere, all I had was a plug spanner and some other tools but its kind of hard to carry a flywheel holder and puller onboard

In theory, cutting the head to reduce squish essentially "advances" your timing automatically...think about it. what you are doing is lowering the position of the spark plug in relation to TDC, so just before TDC when the spark goes (10*?) the spark initiates combustion which has less distance to travel between the plug and the top of the piston than on a stock motor.

Think of it like this: If 2 guys jump of a rock at different heights at the same time, one at 2m and one at 6m, who will hit the water first? the lower one obviously...his arrival at impact would have been advanced just because he was lower down!

now advancing the timing +4 ontop of a cut head is like the guy at 2m jumping 4 seconds before the guy at 6m. and maybe its too early and he land on a passing canoe...

so in my mind, i rather shy away from such scenarios and rather let the head do the work for me.

On the other hand, if your head and deck heights are STOCK. DO IT!

from what these other guys are saying they had stock de
ck height, head and squish.

but i have run that with 4* and never had a ping.

 

[Triplecrown421]

coming in a bit late the detonation on my blaster was bad at peak rpm (sandpit runs) and as soon as it could be herd the motor would jump down in power immediately. my motor has all stock clearances and i was running a 270 main with just bolt ons fmf pipe silencer ect. i had to end up pulling the advance out and have no problem now hitting revlimmiter with no problems. just recently pull the piston from that setup and it didnt look bad but did notice minor detonation spots on the top. if i can remember correctly i advanced the motor first with no problems then installed the fmf system which started it all. btw best is my old man

 

[Blaner]

btw best is my old man

Cool! father and son team onboard.

I dont know, if my motor was stock id do the advance no questions, but when you start breeding horses id stay away. Reason being, it may seem fine but when detonation starts you may be in a remote location where you have no option other than to ride it home with damage resulting.

IMO, it gives me peace of mind knowing my timing is stock and that it would give me problems.

 

[Triplecrown421]

i got a completely different and new setup now and ill try the advance again. the head squash on my bike is alittle bigger now