Author Topic: 175 Chain & sporocket sizes  (Read 5611 times)

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Offline Sye

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175 Chain & sporocket sizes
« on: September 03, 2016, 01:31:41 PM »
I've just received my chain and rear sprocket for the HS. For anyone struggling to find replacements here's the spec.

Chain: 428-108 links
Rear sprocket: 38 tooth 428 with an 80mm PCD

As far as I know these are the same for the DT and the HS, it's the front sprocket that is different?
Be nice - feel good

hmmmnz

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Re: 175 Chain & sporocket sizes
« Reply #1 on: September 03, 2016, 07:34:05 PM »
now if we could find a sprocket from another popular Japanese bike with spares on wemoto that would be pretty handy :D


hmmmnz

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Re: 175 Chain & sporocket sizes
« Reply #3 on: September 04, 2016, 06:23:17 AM »
thats weird, i just measured mine,
and ive got 100mm center to center on the mounting holes, (6 of them)
and a 60mm diameter mounting hole

Offline Sye

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Re: 175 Chain & sporocket sizes
« Reply #4 on: September 04, 2016, 07:18:08 AM »
Mines 4 bolts and the above fits? Maybe later ones had a different carrier and six bolts?
Be nice - feel good

hmmmnz

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Re: 175 Chain & sporocket sizes
« Reply #5 on: September 04, 2016, 08:58:17 AM »
yeah that must be it. 
hmmm  bloody bridgestone,  :D

Offline BRT-GTR

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Re: 175 Chain & sporocket sizes
« Reply #6 on: September 05, 2016, 07:48:09 AM »
now if we could find a sprocket from another popular Japanese bike with spares on wemoto that would be pretty handy :D
       That thought has crossed my mind. I will have a word with Wemoto at the October show, Stafford, to see if they would be interested in making parts for BS machines. Ie, Sprockets and also cables or clutch plates. Our speedo and rev counter cables are similar to those used on some early Kawasaki machines with the same end fittings. The overall number of BS machines in existence might be against us but nothing to lose.

   Brian.
Unspoiled by progress.
I'm so glad I grew up in the 60s & 70s. I did so much stupid stuff and there's no record of it.............Anywhere !!

Offline Sye

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Re: 175 Chain & sporocket sizes
« Reply #7 on: September 05, 2016, 01:08:00 PM »
Brian, what you need is a 38T 525 Pitch 6-hole with a 120mm PCD. I haven't looked yet but I'm sure someone must make one? Just the size of the centre hole needed.
Be nice - feel good

hmmmnz

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Re: 175 Chain & sporocket sizes
« Reply #8 on: September 06, 2016, 10:45:45 PM »
Brian, what you need is a 38T 525 Pitch 6-hole with a 120mm PCD. I haven't looked yet but I'm sure someone must make one? Just the size of the centre hole needed.

dont tell me thats a 200 rear sprocket size as well!!

not even the manual mentions a 525 chain,
im on a 428-108 chain

Offline Sye

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Re: 175 Chain & sporocket sizes
« Reply #9 on: September 07, 2016, 02:34:28 AM »
Sorry for the confusion, that's the chain for the 350. The 200 takes a 428 pitch with 108 links.
Be nice - feel good

hmmmnz

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Re: 175 Chain & sporocket sizes
« Reply #10 on: September 07, 2016, 09:49:07 AM »
whew,  :D
so far we at least have the same chain size,
but at least 2 different rear sprockets,
a 4 bolt  that looks like a rd100 and ybr125 sprockets are the same.
and a 6 bolt that looks like a Yamaha YZF-R 125  and mt125 would fit.


any one with a 175 or 200 have some thing different than a
4 bolt 80mm PCD or a
6 bolt 100mm PCD
??

Offline OldSwartout

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Re: 175 Chain & sporocket sizes
« Reply #11 on: September 08, 2016, 08:10:10 AM »
According to the parts catalog, the change in rear sprockets from 4 to 6 hole occurred at S/N 16M, which means late 175's and all 200's had the 6 hole design. All were 38 teeth, except the 200RS had a 36 tooth sprocket and used a 106 link 428 chain instead of 108.
Karl Swartout
Mooresville, IN
BS175 Roadracer. BS200RS, BS350 GTR

Offline slawsonb

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Re: 175 Chain & sporocket sizes
« Reply #12 on: September 08, 2016, 11:26:23 AM »
Does anyone know if the late 175/200 rear sprockets and wheels are interchangeable with the 350 parts?
...bert

Offline OldSwartout

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Re: 175 Chain & sporocket sizes
« Reply #13 on: September 09, 2016, 07:44:01 AM »
No, they are not.
Karl Swartout
Mooresville, IN
BS175 Roadracer. BS200RS, BS350 GTR

Offline slawsonb

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Re: 175 Chain & sporocket sizes
« Reply #14 on: September 09, 2016, 12:36:19 PM »
Was worth a shot. Thanks Karl.
...bert

 


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