Need info on 4mm long rod setup

[TN BANSHEE]

I just bought another banshee. The crank is needs to be rebuilt and then noticed there is a thin spacers under the jugs. Started looking up some kits and i am seing this spacer come up in the pictures. So i am guessing this has long rod setup. Do i need to buy long rods and pistons setup for long rods or can i buy regular rods and regular pistons and leave the spacer out. I mainly just trail ride. I think the jugs have some major port work done. They look alot different than my stock ones. not looking for insane power but have read everyone says to do the 4mm kit. What are my options? Thanks

[vulvafan537240]

That spacer is for the 4mm crank, not the long rods. Measure the stroke to see if its a stock stroke or 4 mill (54mm stock, 58mm 4mill). If you go with a long rod crank you'll need to run 795 series pistons instead of the normal 513's. If its a hot rods crank it'll have a number in the side of the rod that will tell you if its a long rod or normal.

 

The spacer plate method sucks though. Id have the jugs ported for the 4 mill crank and buy 4 mill domes.

[TN BANSHEE]

I CAN SEE ON THE SIDE OF THE ROD 29L.

[TN BANSHEE]

I CAN SEE ON THE SIDE OF THE ROD 29L. SO DO I NEED LONG ROD PISTONS OR REGULAR ONES? HOW MUCH POWER GAIN IS 4MM STROKER?