Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: Voxonda on February 08, 2010, 12:28:34 PM

Title: 15 teeth sprocket
Post by: Voxonda on February 08, 2010, 12:28:34 PM

In order to get my gearing right I am looking for a 15 teeth 530, rather 520 for that matter, sprocket for my replica (K2-K6 engine). Anyone of of a source?

Thanks in advance,

Rob

Title: Re: 15 teeth sprocket
Post by: Bryanj on February 09, 2010, 06:09:47 AM

15 is too small honda dropped the 16 as they considered that caused problems

Title: Re: 15 teeth sprocket
Post by: Voxonda on February 09, 2010, 06:50:11 AM

Thanks Bryan, you're correct but not when you're riding track.

Cheers, Rob

Title: Re: 15 teeth sprocket
Post by: Bryanj on February 09, 2010, 07:49:34 AM

trouble is the diameter of the sprocket is too small for the chain to travel round properly, better to up the number on the rear.

Holes in crankcase are a bugger to fix

Title: Re: 15 teeth sprocket
Post by: Voxonda on February 09, 2010, 10:41:23 AM

Thanks again Bryan, no offence but think it was in relation to the quality of the chains of that era. 15 teeth for a 5/8" pitch is considered not too small by todays standard. Normally I use the 17/48 gearing, but on a circuit like Croix en Ternois in Northern France you will need a short setup. Maybe 15 is small but it is good to have the possibility to use it.

Title: Re: 15 teeth sprocket
Post by: Seamus on February 09, 2010, 11:15:49 AM

http://www.wemoto.com/bikes/Honda/CB_750_K2/71-72/

May be worth a look as they offer standard, less 1 tooth and less 2 teeth

Title: Re: 15 teeth sprocket
Post by: Voxonda on February 09, 2010, 11:35:42 AM

Thanks for the link Seamus.

Cheers, Rob

Title: Re: 15 teeth sprocket
Post by: Bryanj on February 09, 2010, 04:50:16 PM

No Offence taken at all, just making the point so that the road riders dint get into trouble!

I agree todays chains are better and at least you can use an "O" ring although on circuit its probably better to use a normal one and change more often.

Years back when younger and foolisher i built and maintained a couple of roadrace bikes for a total nutter to race (i was never light enough to consider it) including a Suzuki GT750 that ended up doing 5mpg and an Egli Kawasaki 900, now that was a gorgeous frame. His favourite was the Kawa 350 triple with a bent frame tho' ----really had to pick your circuits for that one.

I was also mildly involved with Mead and Tomkinson's Nessie when i worked there, that was interesting to say the least.

All the best in your endeavours and keep the dirty side down

Title: Re: 15 teeth sprocket
Post by: Yoshi823 on February 09, 2010, 10:16:06 PM

Quote from: Voxonda on February 08, 2010, 12:28:34 PM

In order to get my gearing right I am looking for a 15 teeth 530, rather 520 for that matter, sprocket for my replica (K2-K6 engine). Anyone of of a source?

Thanks in advance,

Rob

I would have gone for a higher quality Renthal front sprocket from B&C Express, but I suppose Wemoto are cheaper...you get what you pay for.
http://www.bandcexpress.co.uk/chain/drive-chain/road-racing.html

Title: Re: 15 teeth sprocket
Post by: Voxonda on February 10, 2010, 08:43:30 AM

Do not know if Renthal has that 15 teeth 520 for the CB750.
Thanks for the link Yoshi.

Rob

Title: Re: 15 teeth sprocket
Post by: Yoshi823 on February 10, 2010, 09:36:45 AM

Both Renthal & Talon Engineering make specials if the information isn't on their file.

http://www.talon-eng.co.uk/

Title: Re: 15 teeth sprocket
Post by: Voxonda on February 10, 2010, 11:03:46 AM

Thanks Yoshi,

Have a few adresses now to contact.

Cheers, Rob