Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: philward on November 22, 2016, 09:52:51 PM

Title: K2 Cam Lobe tolerances
Post by: philward on November 22, 2016, 09:52:51 PM

I only have an original Honda K0 workshop manual - can anyone tell me the minimum wear dimension/tolerances for the inlet and exhaust cam lobes on the 750k2. I assume the KO camshaft id different?
One for you Trig me thinks!
Thanks

Title: Re: K2 Cam Lobe tolerances
Post by: philward on November 22, 2016, 10:56:48 PM

Sorry - make that for the k6! Forgot that the cr750 I'm building from parts has k6 engine (in k2 frame)

Sent from my MotoG3 using Tapatalk

Title: Re: K2 Cam Lobe tolerances
Post by: Trigger on November 22, 2016, 11:10:37 PM

What number and letter is on the cam ?

Title: Re: K2 Cam Lobe tolerances
Post by: philward on November 23, 2016, 06:06:24 PM

R9 is stamped next to sprocket - only other numbers are B and T between 3 & 4 cams - should I be looking for some other numbers Graham?

Sent from my MotoG3 using Tapatalk

Title: Re: K2 Cam Lobe tolerances
Post by: Trigger on November 23, 2016, 07:52:28 PM

Quote from: philward on November 23, 2016, 06:06:24 PM

R9 is stamped next to sprocket - only other numbers are B and T between 3 & 4 cams - should I be looking for some other numbers Graham?

Sent from my MotoG3 using Tapatalk

OK, its a R9 cam. You need 35.50 or above on the inlet (service limit 7.93 on the lift) and 35.10 or above on the exhaust (service limit 7.43 on the lift). If the lobes are not pitted and worn equally, it is good to go.

Title: Re: K2 Cam Lobe tolerances
Post by: philward on November 23, 2016, 08:15:12 PM

Thanks Graham - they are within those figures do that's good - the K0 Honda workshop manual states 35.86 and 35.36 and they where all on or slightly under that so it's a relief they are now within tolerance!

Sent from my MotoG3 using Tapatalk