Bridgestone Motorcycle Parts Discussion Board

Bridgestone Tech Talk => 350 Talk => Topic started by: davis on October 26, 2018, 08:28:22 PM

Title: Leaky Neutral Switch Case Fix
Post by: davis on October 26, 2018, 08:28:22 PM

Just wanted to share an idea on making the Neutral Switch Case leak-free. I got tired of cracking the (old) plastic cases from either installation or engine vibration so I cut a groove in the shifter drum shaft for a #013 (1/16" nominal) o-ring and wrapped teflon tape on the center screw threads. I haven't run with this modification, but bench tested it using kerosine without leaking. I also had some success with using rubber washers under the three mounting screw heads.

- Bob

Title: Re: Leaky Neutral Switch Case Fix
Post by: moonpup on October 26, 2018, 08:53:38 PM

 nopics

Title: Re: Leaky Neutral Switch Case Fix
Post by: moonpup on October 27, 2018, 09:05:57 PM

Bob was unable to post a pic of his fix. He sent it to me and asked if I'd post it, so here it is.

Title: Re: Leaky Neutral Switch Case Fix
Post by: BRT-GTR on October 29, 2018, 12:29:09 PM

     Bob,
           Great job on fitting an 'o' ring to the change drum. I fitted a neutral switch just last week and within hours was taking it off again to try resealing it. Occurred to me that BS could have so easily installed a seal on the shaft.                     Brian

Title: Re: Leaky Neutral Switch Case Fix
Post by: davis on October 29, 2018, 08:25:28 PM

Thanks Brian.

If you don't want to replace the shift drum (as I am going to do this winter) the teflon tape on the longest screw that can be fit in (13mm) will slow down the leak significantly.

- Bob

Title: Re: Leaky Neutral Switch Case Fix
Post by: BRT-GTR on October 31, 2018, 07:30:08 AM

       Cheers Bob, will take you up on tip to seal thread with tape. Pull it off again.............Aaaarrrrrgggggh ;)             Brian.

Title: Re: Leaky Neutral Switch Case Fix
Post by: steve on October 31, 2018, 07:39:09 AM

Brian,

I see that Bob calls it 'teflon' tape...I'm not familiar with that, so wondered what we would buy over here...PTFE?

Steve

Title: Re: Leaky Neutral Switch Case Fix
Post by: BRT-GTR on October 31, 2018, 04:51:46 PM

           Hi Steve,
                          You are right, Teflon tape in the US, PTFE here, same stuff.                            Brian.