Replacement clutch master cylinder gl1200 - Steve Saunders Goldwing Forums

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post #1 of 8 (permalink) Old 09-14-2019, 07:41 PM Thread Starter
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Replacement clutch master cylinder gl1200

Hi everyone! I have not been on the forum for a while because of being so busy. I have an issue with my gl1200 that recently came up. I was riding the other day and went to down shift and the bike did not want to downshift. I had no problems shifting up...only down. The next day I took it for a short ride and it shifted fine untill about an hour after riding. I pulled into my driveway and could not get the bike to go in nuetral. If I turn the bike off it shifts into nuetral perfectly. I suspect I need a new clutch master cylinder. My problem is that I can not find a master cylinder with a 12mm banjo bolt. All of them seem to have a 10mm banjo bolt. I'm lost about this and would greatly appreciate someone's help on this.
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post #2 of 8 (permalink) Old 09-14-2019, 08:28 PM
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The first thing to check is the brass barrel that pushes the piston in.
If it's worn egg shaped its likely your problem.

Advise given here is free and comes with no warranty "Caveat emptor"

Ken.
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post #3 of 8 (permalink) Old 09-14-2019, 08:59 PM Thread Starter
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I'll check the brass barrel in the morning. But I was just going to replace the whole clutch master cylinder to be honest. The banjo bolt is a 12mm but all I can find for a replacement has a 10mm banjo bolt. Is there a replacement clutch m/c with a 12mm banjo bolt? Would my clutch line still connect using the 10mm banjo?
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post #4 of 8 (permalink) Old 09-14-2019, 09:21 PM
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BTW if your banjo bolt is 12mm it's not stock.

Advise given here is free and comes with no warranty "Caveat emptor"

Ken.
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post #5 of 8 (permalink) Old 09-14-2019, 10:07 PM
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I have a,1985 GL1200 and the clutch M/C Banjo Bolts takes a,12mm wrench and the Brake M/C takes a 14mm wrench.
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post #6 of 8 (permalink) Old 09-14-2019, 10:11 PM
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Quote:
Originally Posted by Nochickenwing View Post
I'll check the brass barrel in the morning. But I was just going to replace the whole clutch master cylinder to be honest. The banjo bolt is a 12mm but all I can find for a replacement has a 10mm banjo bolt. Is there a replacement clutch m/c with a 12mm banjo bolt? Would my clutch line still connect using the 10mm banjo?
Yours is a 10mm bolt, the head size is 12mm. Bolt size is not determined by the size of wrench it takes. Your problem may be only old fluid, not the master cylinder.
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post #7 of 8 (permalink) Old 09-14-2019, 10:22 PM Thread Starter
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Thanks for the responses guys! I was confused on the size of the banjo since the head of the bolt is 12mm, I was thinking that was the size of the bolt itself. I'll go ahead and replace the fluid like suggested and see if that does the trick. If not, at least I know now that I can order a new m/c that has a 10mm banjo bolt. I feel a little dumb that I didn't realize this before. I appreciate the info very much!!!
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post #8 of 8 (permalink) Old 09-14-2019, 10:28 PM
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Yes Dave your right on the bolt sizes does not go by the wrench size. I was just saying what size wrench size I have on mine.
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