600 converted 800 monoblock clutch setup

What altitude? Which track? What's your secondary setup?

sled_guy

With my conversion I am running an almond primary spring(120-330) with 10-62 gram weights with 56-42-36 Helix with a black/green secondary spring with stock gearing. I have 144" track and ride at 0-1500' Elevation. I pull to 8350-8400 rpms with this set-up. I also running 430 mains, needle all the way buried, air screws 2.5 turns out. My carbs are also vented to the airbox for the float bowl. Motor runs real crisp at this jetting. Egts are around 1180*. I had an issue earlier with a black/green primary spring sacking out on me and not letting me hit peak rpms. It was like 7400-7600 rpms. As soon as I changed my spring it was tons better. By the way I also have Dmax twin pipes, shaved head(100 octane), porting/polishing on the cylinder/upper crank case. Try dropping your weights to 10-62 grams weights and see what happens. With your Titanium primary I don't think that is the issue with sacking. Hope this helps. When I get home from work in a couple weeks I am going to try a 60-38-42 Helix with a black/lime green spring in my secondary and regeared a little taller for more track speed.

Ya you might want to get a stiffer primary spring that will give you a higher final spring rate which will give you a higher peak rpm. I really like my 120-330 spring. It engages around 4000 rpms and peaks at 8350 rpms.