HEY entomber you see everything i am putting into my 03 baja whats the price difference from what im doing to doing the 800 stroker with case work?

 

2BIG2BFAST

From what I understand, stroke makes more power and lower RPMs. You don't have to scream it to make power. Stroking also produces torque. Look at Bigbaja's gallery page and compare his dyno from a stocker to a 800cc bike. The gains are immense. As my buddy who owns a Baja said.. if ya got a Stroker DS.. I'd be king ding-a-ling around my area.

Wonder how bad it would suffer WITHOUT the larger valves.

 

My 730 has plenty of power down low, I think allot has to do with your cam selection. I am running some of Eric's intermediate grinds, HPR-3 I believe.

Unfortunately the 800 cylinder has a different skirt then the 730 skirt, so that means that you can't buy the 730 and simply swap out cranks to make it an 800.

I would think the 800 would be chocking with the stock valves.

Squatcher, I would love to see some of your 730 dynos. To my knowledge, none of Eric's 730 have been on the dyno.

 

I will get on the dyno in April. Everything will be the same expect the 730 vs the 720. I haven't changed anything else I will post the dyno charts. I told Randal I will get him copies aswell. Keep tight they will be there.

 

cape windy had the first 730 and he brought it to ds days last year. he had 4 or 5 sheets of dyno runs. i'm sure there still around, i might even have them some where if i look real good. for that matter eric probably still has them.

 

a couple #'s for evry one 780cc

 

reading through a mag i seen a kit for a yamaha raptor 780cc kit new rocker box and valves etc no price but a # to call any one want it?

 

730&800 same jug.

 

They may start out as the same jug, but the skirt on the 730 jug is machined down. If the 730 skirt was not trimmed down then it too would require the case to be machined just like the 800 kits.

When building a stroker motor, if you have to machine the case its not really a big deal because you have to split the case anyways to remove the crank. Not having to machine the case on the 730 makes life way easier, you simple swap out one jug for another.

Yes, capewindy did have the first prototype 730 cylinder, I am curious to see the dyno's on the production 730 jug/piston combo. I also believe capewindy had a mix of parts in there from various engine builder.

 

zilla post up the 780 raptor kit info