Search found 100 matches

by Bern
Sun Sep 16, 2012 3:38 am
Forum: Bevel Head Twins Photo Gallery
Topic: 78 SS Resto
Replies: 22
Views: 45738

Re: 78 SS Resto

Spectacular resto....

Agreed, budget and a bevel should never be used in the same sentence. :*<:
by Bern
Tue Sep 04, 2012 11:49 am
Forum: Engine & Transmission Shop
Topic: Squish Clearance 74 750 GT
Replies: 3
Views: 4898

Re: Squish Clearance 74 750 GT

Ended up with 1.0 on the front and 1.15 on the rear. Bikes is running great, except it's leaking oil out of the vertical bevel tower at the very top. :( I did put a little silicone in there when I assembled it but it looks like I didn't use enough. Looks like the head has to come off. :evil: Oh well...
by Bern
Sun Aug 19, 2012 10:47 am
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: 74 GT750 Valve guide seals
Replies: 13
Views: 25457

Re: 74 GT750 Valve guide seals

Just backing up what wdietz said. The bearings are dual row self alinging bearings that are meant to have some angular "play". I used SKF 1203 ETN9 bearings when I last replaced them. Numerous bearing manuafacturers supply equivalents - any bearing shop should be able to supply them. From...
by Bern
Sun Aug 19, 2012 7:40 am
Forum: Engine & Transmission Shop
Topic: Squish Clearance 74 750 GT
Replies: 3
Views: 4898

Squish Clearance 74 750 GT

Hi folks,

Got my heads back, new pistons and newly bored cylinders.
Getting ready to reassemble the top end. I just wanted to get the squish clearances when I reassemble? I am using sport pistons.

Thanks,
Bernie
by Bern
Sun Aug 19, 2012 7:28 am
Forum: Chassis & Suspension Shop
Topic: 74 750 GT 38mm Marzocchi forks
Replies: 11
Views: 20209

Re: 74 750 GT 38mm Marzocchi forks

Perfect!!! The lower washer was not sliding over the bottom lip on the stem. I had to tap it home a little harder to get it to seat and everything snugged up nicely.
by Bern
Sun Aug 19, 2012 4:38 am
Forum: Chassis & Suspension Shop
Topic: 74 750 GT 38mm Marzocchi forks
Replies: 11
Views: 20209

Re: 74 750 GT 38mm Marzocchi forks

No I didn't remove the stem. I had the chance to measure the protrusion on someone else's 900ss and it was 12mm. I'll measure mine today.
by Bern
Thu Aug 16, 2012 4:32 pm
Forum: Chassis & Suspension Shop
Topic: 74 750 GT 38mm Marzocchi forks
Replies: 11
Views: 20209

Re: 74 750 GT 38mm Marzocchi forks

I'm not sure it moved but it seems that there is too much protruding. I had the forks completely disassembled and rebuilt them. When I was putting the lower part of the triple clamp back on the forks I tapped it into position with a rubber mallet. The washer and nut for the steering damper are way t...
by Bern
Sat Aug 11, 2012 5:50 am
Forum: Chassis & Suspension Shop
Topic: 74 750 GT 38mm Marzocchi forks
Replies: 11
Views: 20209

Re: 74 750 GT 38mm Marzocchi forks

One more question. I had the front forks right off and disassembled when I rebuilt them. They needed a pretty good cleaning, One thing I notice now is that the centre shaft for the triple clamp seems to have slipped down a bit. I used a rubber mallet when 'tapping' the triple clamp back onto the for...
by Bern
Tue Aug 07, 2012 4:51 am
Forum: Chassis & Suspension Shop
Topic: 74 750 GT 38mm Marzocchi forks
Replies: 11
Views: 20209

Re: 74 750 GT 38mm Marzocchi forks

How much preload is too much preload? I found a couple of spacers around 2.5 cm long at the top of my forks when I disassembled them. I'm wondering if the previous owner found the springs to be shot and went down this road as opposed to replacing them.
by Bern
Mon Aug 06, 2012 6:19 pm
Forum: Chassis & Suspension Shop
Topic: 74 750 GT 38mm Marzocchi forks
Replies: 11
Views: 20209

Re: 74 750 GT 38mm Marzocchi forks

Perfect thanks.
by Bern
Mon Aug 06, 2012 7:51 am
Forum: Chassis & Suspension Shop
Topic: 74 750 GT 38mm Marzocchi forks
Replies: 11
Views: 20209

74 750 GT 38mm Marzocchi forks

How much fork oil is required I have read 230cc and 250cc Also is the procedure for refilling documented anywhere?

Manual says 280cc

Thanks
B
by Bern
Sat May 19, 2012 9:44 am
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: 74 GT750 Valve guide seals
Replies: 13
Views: 25457

Re: 74 GT750 Valve guide seals

Ha!! It sure is..
:lol:
With 30k miles new pistons are not unexpected though. I'm pretty sure Steve, sells a set here. I need 80mm first over.
by Bern
Sat May 19, 2012 6:05 am
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: 74 GT750 Valve guide seals
Replies: 13
Views: 25457

Re: 74 GT750 Valve guide seals

Thanks for all the input. :-D The heads and barrels are in the hands of a competent bevel mechanic now. The guides in the head appear to have been home made and someone didn't get the interference fit quite right on a couple of them. So the work being done; new guides, new valves, machine the curren...
by Bern
Sun May 13, 2012 2:00 pm
Forum: Roundcase Engines > 750 GT, 750 Sport & 750 Super Sport
Topic: inconsistent running on highway - Surging and failing
Replies: 12
Views: 24087

Re: inconsistent running on highway - Surging and failing

Also look at the vent on the gas cap. There was a home made gasket on mine that had no vent hole in it, so there was a bit of a vacuum in the tank when running for prolonged periods on the highway. This happened on mine and I opened the gas cap and you could hear the air rush in.

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