Cam sprockets

[ZX7ROU812]

Originally Posted by Zippy

The stroker kit sounds interesting, however, do the stock 38mm carbs bottleneck the larger engine, and have you dynoed your bike yet?

Stock sized carbs are are on my bike Zip. I just messed around with the fueling settings. If anything, the 96-03 ZX-7R's should have come with 36 mm carbs ! They're too big for the 749.

Last time she was dyno'ed she laid down a 138 rear wheel HP run. That day, the dyno was being optimistic by about 5 HP I think, and I didn't have her dialed in 100 % (was a little lean on the mains). So i figure those two facts wash each other out. So I just say about 138 !

[ZX7ROU812]

Originally Posted by toddman35

Yeah, but Bhp is at the crank correct? At least I've got a some what reasonable excuse - I think.

Yep.

BHP is NOT RWHP. It's power measured on an engine dyno, not a chassis dyno.

Also keep in mind when Manufacturers list the "Dry Weight" of their bikes, there are NO liquids in it. NONE ! No fuel, no oil, no coolant, no brake fliud, no fluids in the forks and shocks. NADA, ZIP, ZERO, ZILCH ! BONE dry !

[SyntheticReality]

So where can I get a walkthrough of how to build a stroker and a list of parts I need? How much will it cost me if I do the labor myself?

[Zippy]

Originally Posted by ZX7ROU812

Stock sized carbs are are on my bike Zip. I just messed around with the fueling settings. If anything, the 96-03 ZX-7R's should have come with 36 mm carbs ! They're too big for the 749.

Last time she was dyno'ed she laid down a 138 rear wheel HP run. That day, the dyno was being optimistic by about 5 HP I think, and I didn't have her dialed in 100 % (was a little lean on the mains). So i figure those two facts wash each other out. So I just say about 138 !

Nah, all the specs sheets I've seen have them listed as 38mm CVs, it might depend on where you're measuring.
138 is Damn impressive. I imagine your 7 moves OUT. Given the new weight/power ratio, it's competitive with the new line of 600 SS bikes.

[ZX7ROU812]

Originally Posted by Zippy

Nah, all the specs sheets I've seen have them listed as 38mm CVs, it might depend on where you're measuring.
138 is Damn impressive. I imagine your 7 moves OUT. Given the new weight/power ratio, it's competitive with the new line of 600 SS bikes.

They are 38mm CV's. I'm saying they SHOULD have been 36's, as the 38's are actually TOO big for the stock engine, as anyone who has jetted the bike can attest to the pain in the ass they are to set up correctly. ALWAYS too rich somewhere in the powerband !

Yeah, she moves out pretty good . 600's ? They have NO chance. Even the new 636 ZX-6R's and GSX-R 600's. I have friends with each. I TROUNCE them. The only bikes I can't hang with are the newest crops of the liter bikes. My bike is faster than my friend's 2003 GSX-R 750. Now whether it's the bike or the rider, I'm not sure. But a win is a win...

And given the fact I've replaced all the heaviest items on the bike (Titanium exhaust, no emmissions, lighter bolts, carbon air ducts, etc), it SHOULD weigh CONSIDERABLY less than a stocker. So the power/weight ratio should be nice.

[Zippy]

Doh, there I go skimming and scanning again, sorry about that.

does the clutch/trans have any trouble with the additional power? I'm definitely going to invest in a 96+ motor to play around with. Did you go for new or used crank/connecting rods in your build? Or, what did the whole build cost (including whatever head work you had done) if you don't mind me asking.

I love the looks and handling characteristics 7R, but the power just isn't there. A mod like this gives it the shot in the arm it needs.

[SyntheticReality]

I want to do this too, for sure...