Not quite sure where to post this but maybe someone with experience with this engine can give me a tip before I order the sprockets.
I bought the engine from somebody in this forum and he ran the following setup
22t JS in
9t SJ out
48t rear sprocket
I get a ratio of 9.026
He said he had around 50mph at 6700rpm
Now my goal is a good cruising speed of 50mph at a lower rpm
The website where I can order the jackshaft only offers the JS sprockets from sizes 10 to 18 and it would be great to order everything from one place.
So if I order the clutch with 12t then 18t in, 10t out and to a rear sprocket of 44t (which i still have around here somewhere)
I get a ratio of 6.600
If I calculate right, this would mean I can go same speed (50mph) with about 4904rpm. Which sounds perfect but then again I think it might be a little too long the ratio because of the start from dead stop.
Now from what I heard the engine got lots and lots of torque so here is the question:
Do you think this is a too long ratio for launching from dead stop?
Compared to my current bike with a slightly tuned (higher compression) 80cc running a 34t sprocket in the rear I can still perfectly launch from dead stop without paddling so im pretty sure with a monster like the Predator it should be no problem with this ratio setup. Or not?
The clutch I want to get engages at 2.000rpm