Search found 79 matches

by Spagjet
Mon Mar 23, 2015 3:51 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: desmo exhaust valve seals
Replies: 17
Views: 12357

Re: desmo exhaust valve seals

Hi Craig, man, you must be up there with Falloon (or beyond) as far as arcane knowledge of bevels go. I ended up ordering some Viton orings (which apparently will stand the heat) with 1.5 section and 8mm i.d. I figure that even though the orig spec is 7.65mm they will still drag on the stem from bea...
by Spagjet
Sun Mar 22, 2015 4:51 pm
Forum: Engine & Transmission Shop
Topic: Exhaust Pipe Dents
Replies: 3
Views: 4222

Re: Exhaust Pipe Dents

Hi, I have gotten lots of dings and dents out of pipes and mufflers over the years, I generally braze a small nut to it, run a plug tap down it to clear any braze and use a small slide hammer to ease the ding out with a bit of heat from a torch with a small welding tip licking at it at the same time...
by Spagjet
Sun Mar 22, 2015 6:56 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: desmo exhaust valve seals
Replies: 17
Views: 12357

Re: desmo exhaust valve seals

Hi Craig, that's very interesting, I measured the section on the old o ring (1.5mm) against the new green o ring (1.7mm+), the oring groove in the valve guide just isn't wide enough to get the oring to seat in it, you can sort of squash (part of) it in with the side of a thin pin punch but it just c...
by Spagjet
Sat Mar 21, 2015 8:30 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: desmo exhaust valve seals
Replies: 17
Views: 12357

desmo exhaust valve seals

Hi, just wondering if anyone knew if the smaller of the two cylinder head o rings were the same as the exhaust valve stem seal o ring. That's what I was told and that's what I was sent but I have tried for ages to install the new orings without the slightest success. I got the old seals out, they ar...
by Spagjet
Wed Dec 17, 2014 12:17 pm
Forum: Engine & Transmission Shop
Topic: new pistons
Replies: 4
Views: 3778

Re: new pistons

thanks for the replies. I had a cast around for Ross pistons that would fit my model Ducati but came up empty. Thanks for letting me know about them, never heard of that brand before. Thanks for the info on genuine (shocked they are still available) and Carillo items Steve (heard they are the go to ...
by Spagjet
Tue Dec 16, 2014 2:41 pm
Forum: Engine & Transmission Shop
Topic: new pistons
Replies: 4
Views: 3778

new pistons

Hi all, wondering if anyone can tell me where I can get a hold of a pair of first oversize (86 and a half or so) forged pistons for my '81 Darmah? I am in Australia but won't baulk at buying from OS if the price/postage is right. I am hearing that JE pistons are the go nowadays which are made in the...
by Spagjet
Sat Jun 14, 2014 1:55 am
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: 78 900SS fork upgrade
Replies: 9
Views: 7685

Re: 78 900SS fork upgrade

BevHevSteve wrote:There is a big difference between 'works just fine' and 'huge improvement'.

Our dual rate fork spring kit falls into the 'huge improvement' category.
True. Old Italian bike and works just fine always sound good in the same sentence but you can always make it better.
by Spagjet
Sat Jun 14, 2014 1:43 am
Forum: Body, Paint & Rubber Shop
Topic: 1979 SSD Darmah seat fixings
Replies: 5
Views: 7258

Re: 1979 SSD Darmah seat fixings

huh, mines the bootlid model, I thought the seat mounts would be the same as a whaletail. Very different from the photos from Machten
by Spagjet
Tue Jun 10, 2014 7:10 pm
Forum: Squarecase BOSCH Ignition Engines > SD, SSD Darmah, late 900 SS & 900 GTS
Topic: 78 900SS fork upgrade
Replies: 9
Views: 7685

Re: 78 900SS fork upgrade

pull both springs out and check both are exactly same length. If they are keep using them but with 15 weight oil instead of 10. If springs aren't same length new springs required. All springs sag a bit over time from hammering but as long as they are still same length they are fine. I am always look...
by Spagjet
Tue Jun 10, 2014 6:44 pm
Forum: Body, Paint & Rubber Shop
Topic: 1979 SSD Darmah seat fixings
Replies: 5
Views: 7258

Re: 1979 SSD Darmah seat fixings

Hi Mark, there is a couple of little tubes welded to the frame that bolts pass up through into the seat base on Darmahs. They aren't right at the back of the seat but just behind the shockie mounts. There is two little steel plates riveted to the fibreglass seat base under the seat foam with a 6mm t...
by Spagjet
Mon May 19, 2014 2:46 pm
Forum: Engine & Transmission Shop
Topic: 860 GT mystery repair
Replies: 11
Views: 4846

Re: 860 GT mystery repair

not all cases had it, I have got three bevel engines and none of them have got epoxy in that part of the case, I have seen a lot of other bevel engines very close up and never seen it on any of them either. I wonder what the actual story was behind it, maybe it was a particular batch of case casting...
by Spagjet
Tue May 06, 2014 11:48 pm
Forum: Carburettor & Fuel System Shop
Topic: 81 Darmah with 40MM carbs
Replies: 4
Views: 6571

Re: 81 Darmah with 40MM carbs

I think it's only the early seventies bevels that had the narrower manifold studs (bearing in mind that thinking is not actually knowing). I think this because my '81 Darmah (32mm) has got 58mm stud spaces, my '76 GTS had stock 32's which I swapped (carbies and manifolds) for 36's, swapped straight ...
by Spagjet
Sun May 04, 2014 4:19 pm
Forum: Bevel Head Twins Photo Gallery
Topic: 750GT Rolling Basket Challange
Replies: 152
Views: 78561

Re: 750GT Rolling Basket Challange

looks like repaired crash damage on the front of the sump and the engine bolt bit. I think a peice of fin has been replaced on the sump. The cases commonly crack around the engine bolts in crashes as the engine is a stressed member. Often if a chain breaks and jams (and breaks out a peice of the cra...
by Spagjet
Sun May 04, 2014 4:03 pm
Forum: Carburettor & Fuel System Shop
Topic: 81 Darmah with 40MM carbs
Replies: 4
Views: 6571

Re: 81 Darmah with 40MM carbs

I've got an '81 Darmah with 32mm carbies (original equipment), it runs perfect, good idle, no flat spot, all the power in the world, if the power curve was any sweeter it would pull my arms out of the sockets. 40mm carbies really aren't the best option for road use. 36mm carbies are off Pantahs I th...
by Spagjet
Thu May 01, 2014 10:34 pm
Forum: Engine & Transmission Shop
Topic: 860 GT mystery repair
Replies: 11
Views: 4846

Re: 860 GT mystery repair

hmm, thinkin' about another bike with the missing barrels. bevels on the brain..........

I agree with Craig, all good.

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