Super bore Cyls

[DylanS]

What for big bore cyls are floating around out there anymore to run on a stock stroke 701 bottom end anymore? I know thrust has a 850 kit but that’s about all I can remember.
Anyone have any personal experience with any of them? Probably looking to stay on a stock stroke crank on this particular build but bump to something with power valves and tweaked ports.

 

[Big Kahuna]

Blowsion had one I think. Jetworks had one... I would go with Jetworks personally.

 

[kevbo]

From all I can gather sleeve and piston availability is very poor for these custom made cylinders. Something to think about if you want to stick around for a while.

 

[DylanS]

From all I can gather sleeve and piston availability is very poor for these custom made cylinders. Something to think about if you want to stick around for a while.

Honestly it seems like sleeve and piston availability is poor for almost every thing all the time these days haha.
But good point.
Maybe I’ll go back to a 66e platform then.

 

[Freakrider]

Blowsion Big Bore Cylinder Sleeve - Yamaha 850cc

Blowsion Big Bore Cylinder Sleeve - Yamaha 850cc

blowsion.com

I had one of these put together by Chucky at XS, it had some decent power. These use CR500 pistons which are available in various over sizes. I sold it to Thomas Baker and then got a xs900R.

 

[Roseand]

Honestly it seems like sleeve and piston availability is poor for almost every thing all the time these days haha.
But good point.
Maybe I’ll go back to a 66e platform then.

The new wdk900e is pretty insane... Does as many combos as you want.

 

[DylanS]

The new wdk900e is pretty insane... Does as many combos as you want.

I have run 927’s for years and they are stout. I have a long block laying around but honestly the reliability of a stock stroke well built 700+ cc engine is hard to get away from. I have personally had multiple negative experiences with more than one major brand in the aftermarket world and I’ve come to the conclusion that being able to source oem parts is almost worth the difference in power. Which I suppose is irrelevant with big bore niche cyls and pistons anyways haha.
I suppose I got away from the 927 because of having to deal with sourcing parts and price.
If anything I suppose I’ll go to a TPE next.

 

[fastgtfairlane]

Also wouldn't hesitate to get one of the php setups from lpw.

 

[Storbeck]

Group k 850 might be worth considering if you're looking for big bore and reliable.