what does it do, and how does it give you more power???
also is a jetting change need, and how do you know how much is need to change it???
also what does a lightened fly wheel do??? just a few question i have been thinken about, and i knew this was the place to come and get everything figured out?? thx guys

 

timimg ether goes +4 or+7 its a hotter spark witch means race fue
lighting the fly wheel just makes it rev faster

 

"Hotter" is probably not the best way to define timing spark advance. Only a stronger coil can create a hotter spark. Timing determines when the spark plug ignites. +0 would be exactly at TDC (I'm pretty sure, but not positive on this). By advancing the timing, you are making the spark fire premature which doesn't create any hotter of a spark, but does create a stronger detonation. However, earlier spark also makes it likely for premature ignition, which is bad. That is why higher octane is necessary, harder to burn and less likely to ignite before its supposed to.

Colby

 

i got 2 buddies with shees.. one has +4 the other +7.. they both use pump gas... should they be usin high octane?

 

Ive heard that its better to increase the compression and not touch the timing except to prevent detonation.

 

Hozed, if the guy running +7 has higher compression then he better be running a higher octane. you can't always hear detonation on a 2-cycle. The Banshee runs a mild overall ignition timing and benefits well from advancing. A lot of guys dont realize the gain from such a simple thing and never do that easy mod. The +7 makes the best power but the only drawback is heat buildup under longer runs. More compression is done usually to increase bottom end, but is also done to compensate for exhaust port timing changes and help overall power output. Miniblaster, get a Vito's +4 key and you will feel the difference.

 

hes had it like this for a while now... no problems yet... ill let him know tho.

 

I just put the vitos +4 key in my banshee and it got about 1.5 rwhp. Not too bad for 25 bucks!

 

Too much timing advance will cost you some top end revability. 4 degrees is the best bet for the stock igntion, however, I am leary of the offset keys. I have sheared a flywheel key and have seen MANY others sheared. I would think the offset key would be even easier to shear due to the fact it is not thick where the flywheel meets the crank. I think it would be better to go with the timing plate or aftermarket igniton (which both will be adjustable further if you decide to do other mods).