Author Topic: BWS stuck in "high"  (Read 261 times)

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Offline MrBacon

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BWS stuck in "high"
« on: May 02, 2017, 09:20:06 AM »
Howzit guys

I have BWS 100. It has just over 30000km on the clock. it seems as though it is stuck in "high gear". When i come to a complete stop the revs are low and pulls away really slow. On occasions its as if it comes right and it pulls away nice. Ever since i have had it it is as if it has only two speeds.

It definitely needs some maintenance but where do i start to get it riding right again? Could it be the rollers?

Where can i buy maintenance parts from? Yamaha is ridiculously expensive.

Kind regards
Jason Bacon


Offline 2Boosted

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Re: BWS stuck in "high"
« Reply #1 on: May 02, 2017, 10:39:20 AM »
Hi Mr Bacon,

Yes, your rollers could be worn. When last did you service it?

Your variator could be quite dirty, I find this prevents it from changing down as dirt accumulates where the sliding plastic bushes struggle against it.

Also, your variator can get a bit scored on the surfaces that the rollers touch on - polishing these up helped my scoot a lot.

Randburg motorcycles can supply rollers and other bits - speak to Mike.

Offline MrBacon

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Re: BWS stuck in "high"
« Reply #2 on: May 02, 2017, 11:21:21 AM »
Hi 2Boosted

Thanks for the reply. I will pull it apart tonight and see what i can clean. Any special lubes needed?

As for the service, it hasn't really had what I would call a service in about 13K km. Not many bike shops stock the necessary items or information.

I see a nice blue BWS around my area never had an opportunity to ask the guy for some info.


Offline Skaap

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Re: BWS stuck in "high"
« Reply #3 on: May 04, 2017, 09:29:28 AM »
worn tranny parts.

belt.
rollers
general clean up.
new ear oil.

done.
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Offline Skaap

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Re: BWS stuck in "high"
« Reply #4 on: May 04, 2017, 09:29:41 AM »
you could also have a broken clutch spring.
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Offline MrBacon

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Re: BWS stuck in "high"
« Reply #5 on: May 05, 2017, 08:29:08 AM »
Hi guys

So as it is my daily transport it cannot stand. I opened it up and the rear pulley was jammed all the way open. All i could do was spray it with some carb cleaner. It came right. only gave a little stress this morning. Yamaha is around R400 for rollers and R700 for a belt. The belt is relatively new and didnt seem to be worn.

Is there any bike shops that sell aftermarket parts Mike at Randburg motorcycles suggested I try Yamaha. I have an aftermarket pipe on, no idea what pipe it is. It is rather thin.

Offline 2Boosted

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Re: BWS stuck in "high"
« Reply #6 on: May 05, 2017, 01:20:35 PM »
The clutch sliding sheave may need replacement or at least re-greasing.

Inside the variator needs grease, and inside the sliding sheave. Use CV Grease.

If the grease is leaking out you may need new seals - these you can get from Linex yamaha.

There's a Vespa workshop on Beyers Naude just up from Cresta, they can get aftermarket performance parts.


Offline Skaap

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Re: BWS stuck in "high"
« Reply #7 on: May 11, 2017, 02:50:40 PM »
The clutch sliding sheave may need replacement or at least re-greasing.

Inside the variator needs grease, and inside the sliding sheave. Use CV Grease.

If the grease is leaking out you may need new seals - these you can get from Linex yamaha.

There's a Vespa workshop on Beyers Naude just up from Cresta, they can get aftermarket performance parts.


the rear pulley(torque converter) is either very filthy, or based on your rides millage worn beyond repair.

https://www.google.co.za/search?q=worn+torque+driver+yamaha+BWS&source=lnms&tbm=isch&sa=X&ved=0ahUKEwifpMTj7-fTAhVGGsAKHdu3AysQ_AUIBigB&biw=1536&bih=735#imgrc=_p67ek62xqzM_M:

the image is a worn one. ^^^^

this is a new one.

https://www.google.co.za/search?q=worn+torque+driver+yamaha+BWS&source=lnms&tbm=isch&sa=X&ved=0ahUKEwifpMTj7-fTAhVGGsAKHdu3AysQ_AUIBigB&biw=1536&bih=735#tbm=isch&q=torque+driver+yamaha+BWS

you will need the grip of 100 gorilla and a size 41 socket to open it up and check it properly.

you need to split the clutch form the torque converter.



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Offline Stanthescooterman

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Re: BWS stuck in "high"
« Reply #8 on: May 12, 2017, 07:13:46 AM »
you will need the grip of 100 gorilla and a size 41 socket to open it up and check it properly.

Or if you have non-Gorilla grip like me, just stand on it  :yes: just watch your ballas ..
« Last Edit: May 12, 2017, 07:15:14 AM by Stanthescooterman »
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Offline Skaap

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Re: BWS stuck in "high"
« Reply #9 on: May 12, 2017, 02:44:29 PM »
you will need the grip of 100 gorilla and a size 41 socket to open it up and check it properly.

Or if you have non-Gorilla grip like me, just stand on it  :yes: just watch your ballas ..

teh BWS clutch assembly is so tiny, even my size 9s are to big.

looses the nut just a bit so there is play on the assembly and get a friend to help.  the stock spring is not to bad. the race springs..... bloody nora, they hit you ballas!
« Last Edit: May 12, 2017, 02:45:45 PM by Skaap »
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