Author Topic: SPORT 90 cylinder base gasket  (Read 233 times)

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Offline fahrkle

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SPORT 90 cylinder base gasket
« on: April 02, 2017, 12:36:17 PM »
Hello all -

I have to replace a bad cylinder base gasket on a Sport 90. I received one the other day and it is in 3 pieces - not torn, but legitimately looks factory cut.

Is this right or should it be in 1 piece?

Also, I cannot find torque specs or tightening sequences anywhere for cylinder to motor or head to cylinder.

Anyone have any answers?

Thanks

Jade

Offline mqtsteve

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Re: SPORT 90 cylinder base gasket
« Reply #1 on: April 02, 2017, 02:39:26 PM »
Hey Jade,
The gasket should be in one piece. 
Torque setting for the 6mm cylinder nuts: 70-85 Inch pounds (5.8-7.2 ft. lb.) from Bridgestone 90 Service Standards Manual by Rockford.  Good luck, Steve
Steve S.
4/1966 BS90 Sport(o.i.), 5/1966 BS90 Sport(o.i.),
1965 BS90 Trail, 1965 BS90 Mountain

Offline fahrkle

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Re: SPORT 90 cylinder base gasket
« Reply #2 on: April 03, 2017, 10:15:07 AM »
Thanks Steve - Is that the cylinder base nuts, the cylinder head nuts or all of them?

Offline mqtsteve

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Re: SPORT 90 cylinder base gasket
« Reply #3 on: April 03, 2017, 11:14:28 AM »
Jade,
That's for the small hard to get to cylinder base nuts.
Cylinder head nuts torque: 95-113 inch pounds (7.9-9.4 ft. lbs.). 
Let me know if you have any other questions, Steve
Steve S.
4/1966 BS90 Sport(o.i.), 5/1966 BS90 Sport(o.i.),
1965 BS90 Trail, 1965 BS90 Mountain

Offline fahrkle

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Re: SPORT 90 cylinder base gasket
« Reply #4 on: April 03, 2017, 02:58:16 PM »
Thanks Steve -

I have printed off the tech manual from this website, but torque specs are not given in that manual.

I assume I should torque them in a criss cross pattern?

Thanks again!

Offline fahrkle

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Re: SPORT 90 cylinder base gasket
« Reply #5 on: April 10, 2017, 11:31:25 AM »
Hello all -

Where are people getting the little mudflap on the bottom of the front fender for the Sport 90's. I cannot seem to find them anywhere.

Also I am looking for a front brake cable for a Sport 90 and a clutch lever.

Thanks!!

Jade

Offline Richard Clark BS parts

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Re: SPORT 90 cylinder base gasket
« Reply #6 on: April 10, 2017, 11:46:32 AM »
Jade

You could have asked in you last  list request to me.
You asked about the rear mud flap but not the front.

Did not ask for a cable or lever either,  please send me an email if interested

Thanks
Richard Clark
Richard  Clark, Owner and provider of this site
BRIDGESTONE MOTORCYCLE PARTS
New Albany IN

bsparts@aye.net

 


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