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Author Topic: Exhaust collar measurement  (Read 673 times)

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Offline bjbuchanan

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Exhaust collar measurement
« on: April 12, 2013, 05:15:32 AM »
Hey can anyone give me a quick measurement on some 77-78 exhaust collars? The half moon ones. I just need to know the length of a stock set.

Thanks
Brian
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The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers

Offline flybox1

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Re: Exhaust collar measurement
« Reply #1 on: April 12, 2013, 11:23:47 AM »
IIRC, they are about 32mm tall.  I can measure when i get home
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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Offline bjbuchanan

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Re: Exhaust collar measurement
« Reply #2 on: April 12, 2013, 11:40:10 AM »
Thanks for the ballpark. If you could get an exact figure later that would be great
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The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers

Offline scottly

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Re: Exhaust collar measurement
« Reply #3 on: April 12, 2013, 03:18:58 PM »
35mm. Also, the stock head pipe is 35 mm outside diameter. If you are going to use the stock collars on aftermarket exhaust, check the diameter as some are larger and the stockers won't work.
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