So how many of you have put a 900 KK twin in your Rev Chassis?
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THe key is the engine plate and getting the alignment correct. Since the Rev uses side bolted motor mounts, there is ALWAYS tension on the mounts. Need to find a way to support the weight and torque of the engine. I'm still tweaking the torque arms and push arms to keep the engine stable.
Also, need to add support for the bulkhead around the primary clutch (see pic above). We replaced the stock tunnel/bulkhead support plate w/1/8" for flex support. Also added a support bar above the primary clutch to tie everything together.
modsledr
Put the 440 engine brace under the motor.
I want my new 973 [ 1000 Cat pistons in an 900 ] in an XP.
Owen
^ What he said ^
I started out with a 440 and I've had ZERO issues with alignment, flexing or anything of the sort. I set mine up to run the 8DN Yamaha belt and I'm still on the original.
Are you also running the motor mounts out of the race sled with the aluminum cross shafts? If not, that's your biggest problem. There shouldn't be any need for front to rear cross bracing with the way the Rev is designed. (mid part of the pyramid anyway, the nuns are a different story...)
[/QUOTE]Direct drive? Why is the secondary so low?
^ What he said ^
I started out with a 440 and I've had ZERO issues with alignment, flexing or anything of the sort. I set mine up to run the 8DN Yamaha belt and I'm still on the original.
Are you also running the motor mounts out of the race sled with the aluminum cross shafts? If not, that's your biggest problem. There shouldn't be any need for front to rear cross bracing with the way the Rev is designed. (mid part of the pyramid anyway, the nuns are a different story...)
Beels,
Did you use the stock 440 engine plate and modify it for the 900 Cat cases?
Unfortunately for me, the person I bought the sled from had a custom engine plate made, so I'll have to re-do that in order to use the cross brace and motor mounts.
thanks again,
modsledr
Was the original builder's name John and the sled featured in one of the Mod-Stock mags?
I looked at the pics again and that sled sure looks familiar. If so, he gave me quite a few pointers when I built mine. I had Brad Wursten build my mount plate, so it'll be real similar to that one. I built mine on my last 440 chassis I had so it had all the bracing already in it. The plate sits a touch higher than the original did, so I glued some rubber belting on the bottom of the plate so the bottom brace was functional. With the 440 engine mount bushings and cross tubes, it is REAL solid in there.
Yes, I bought this sled from John. Unfortunately when he built it, the 440 wasn't out yet so he used the stock Rev motor mounts.
Thats good to know about the bracing...I'm going to get the support brace and see if I can add it. My mount plate wont work with the 440 motor mounts/cross bars. The stock Rev motor mounts support the engine with the mount bolts inserted horizontal. This puts constant vertical stress on the motor mounts and they fail. However, I think the support brace will help...should take some of the stress off the motor mounts.
Thanks again,
modsledr