piston identification? and size needed

[chris_sims1981]

I have a piston with the markings 8590H 8963 and bore size 69.95 and I was wondering who made it. I tried searching to no avail, also what would be the next size up? I have to send the cylinders out but I have to buy the pistons and ship them with the cylinders for a top end rebuild. Any help will be much appreciated

[Starwriter]

 I have to send the cylinders out but I have to buy the pistons and ship them with the cylinders for a top end rebuild.

 

No you don't. Only use a BHQ sponsor builder and let them supply the pistons.

[BANSHEE HP]

pictures?

[chris_sims1981]

I couldn't because the file size is too big. Which builder do you recommend?

[Starwriter]

Redline

[uman1030]

I couldn't because the file size is too big. Which builder do you recommend?

download taptalk on your phone and use it to upload pics from your phones picture gallery. It will put them in the right size to post them easily

[chris_sims1981]

Here it is

[gonzodesign]

thats a Wossner piston, the problem you may have is when someone does a run of pistons for themselves they may get assigned a number that is only for them, what is it out of

[chris_sims1981]

A banshee that has a stock crank with Yamaha rd400 rods, pj 34 carbs, t5 pipes, vforce 3 reeds, 69.9mm bore and a trinity 4 cool head with 22 cc domes.

[trickedcarbine]

The RD rods are 115 I believe. So a 795 Weisco should suffice.

[gonzodesign]

yes they are 115, they are a 2T2 rod (RD400) and have I think a smaller slotted big end, they are the same as a banshee long rod dimension wise its the oiling thats different, running that rod in a hi revving Banshee may not be a good idea, I am gonna research the main difference but believe thats it

[chris_sims1981]

O cool. I'm trying to put this thing back together, mainly will be a trail bike for now. I'll do the bottom end next year