Bridgestone Motorcycle Parts Discussion Board

Bridgestone Tech Talk => 50, 60, 90 & 100 Talk => Topic started by: fahrkle on April 02, 2017, 01:36:17 PM

Title: SPORT 90 cylinder base gasket
Post by: fahrkle on April 02, 2017, 01:36:17 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

Title: Re: SPORT 90 cylinder base gasket
Post by: mqtsteve on April 02, 2017, 03:39:26 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

Title: Re: SPORT 90 cylinder base gasket
Post by: fahrkle on April 03, 2017, 11:15:07 AM

Thanks Steve - Is that the cylinder base nuts, the cylinder head nuts or all of them?

Title: Re: SPORT 90 cylinder base gasket
Post by: mqtsteve on April 03, 2017, 12:14:28 PM

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

Title: Re: SPORT 90 cylinder base gasket
Post by: fahrkle on April 03, 2017, 03:58:16 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!

Title: Re: SPORT 90 cylinder base gasket
Post by: fahrkle on April 10, 2017, 12:31:25 PM

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

Title: Re: SPORT 90 cylinder base gasket
Post by: Richard Clark BS parts on April 10, 2017, 12:46:32 PM

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