crank and piston?

[chris_sims1981]

 I measured and I got 4 5/8 inches - 2/12 inches which gave me 2 1/8 inches.

[sstaton1983]

I measured and I got 4 5/8 inches - 2/12 inches which gave me 2 1/8 inches.

That equates to roughly 54 mm..witch would be stock stroke.

[chris_sims1981]

Ok cool, then I was sold the wrong piston like I thought in the beginning

[chris_sims1981]

the only markings on the crank was 29L and on the rod was YAMAHA on one side and 2T2 C and something else that I couldn't make out

[sheerider11]

I've never seen a Yamaha stamped rod

[gonzodesign]

29L is a stock stroke and a 110 rod, 29M is a 115 rod,  but a 2T2 rod is from a 1977 to 1979 RD 400 road bike and is 115 mm long

Edited April 6, 2014 by gonzodesign

[chris_sims1981]

Ok thanks gonzodesign.

[chris_sims1981]

29L is a stock stroke and a 110 rod, 29M is a 115 rod,  but a 2T2 rod is from a 1977 to 1979 RD 400 road bike and is 115 mm long

 Would this make it a stroked motor? ^^

[gonzodesign]

I was just refering to rod lengths and the odd 2T2 rod, that paticular rod has (I believe) a different oiling slot for the bottom bearing and was not intended to run as high of RPM or as hard as a Banshee is run so if thats the rod he's using it is 115mm long but may not be the best choice for a banshee.

[gonzodesign]

I found out that the 2T2 rod has a 20mm OD upper rod end where a Banshee will be 21 so a Banshee wrist pin bearing will not go in the rod you must use Yamaha RD400 bearings!! not a good scenario to be in.