Ok i have a 1915, vz-15 cam, solex twin crabs, stock rockers not sure what heads, 009 distributor and i just put a msd 6AL box and a msd blaster 2 coil. my question is what is a safe max rpm to run this motor at i need to know so i can order the right rev limiter module for the 6Al. thanks

6000

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stock crank & rods 5500 . c/w 6000?

If you have stock connecting rods, I would put in a 5500 chip.

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5500 and put a good set of rockers on it!

any recommendation on what rockers to run. what will i be safe to run with the vz-15 cam.

not really sure if they are stock crank and rods is there any way to tell with out tearing it down.

I think 2000 - 3000 would be a very safe RPM range.

I actually have a rev limiter on my buggy set to 6000

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run it till the valves flot then let off a little that should be just right

a rev limiter... could someone explain....

i all ready broke a valve spring from over rev just trying not to break anything else i dont have the extra $$$$$ to fix it right now.
lol yea i had the 3000 chip in to see how well the rev limiter worked i now have the 6000 chip in.

Did the spring have any rust on it? Were you running single or dual valve springs? Cb's new CB 650 dual valve springs are one of the best ones out there. A VZ 15 cam was designed for 1.1 rockers.