Search found 282 matches

by bobnorton
Fri Nov 23, 2018 12:05 pm
Forum: Introduce Yourself
Topic: 1959 Ducati 200 Americano
Replies: 8
Views: 542

Re: 1959 Ducati 200 Americano

Engine parts will be hard to find,re-use everything possible.
by bobnorton
Fri Nov 23, 2018 12:00 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 860 gts cams & followers.
Replies: 1
Views: 1618

Re: 860 gts cams & followers.

Look re-usable to me. A clean up with a smooth oilstone,a coating of cam lube. I would check the oil supply ,particularly in the primary casing where oil flow can be lost if the transfer arrangement from oilway to crank are messed up by the omission of a washer that will allow the oil to go straight...
by bobnorton
Tue Mar 31, 2015 8:58 am
Forum: Carburettor & Fuel System Shop
Topic: wrong carbs
Replies: 4
Views: 4024

wrong carbs

A pal has built a special using a 900 Darmah motor and fitted it with a pair of PHF carbs from a Laverda Jota!, These do not have idle speed screws. I don't think he will get this to run sensibly. Any thoughts?.
by bobnorton
Wed May 28, 2014 10:13 am
Forum: Carburettor & Fuel System Shop
Topic: Slides and ramps.
Replies: 32
Views: 12591

Re: Slides and ramps.

Hi Steve. My guy did the job in no time and did not distort the slides, However we are talking a pro machinist of 50 years (or more) practice,who also makes his own engine parts for 4 cylinder veterans when he's got a break from production runs .If only i had his talents!!.
by bobnorton
Wed Jan 15, 2014 12:55 am
Forum: Engine & Transmission Shop
Topic: FAQ: clutch pushrod order info
Replies: 27
Views: 27574

Re: FAQ: clutch pushrod order info

Hi Spagjet, Thanks for your comprehensive reply, I have fitted a long arm and its set at the end of the slot (extra ball or roller in there somewhere),this also means that the arm retains the short rod if the cable breaks.My main problem was the retaining in position of the end fittings while fiddli...
by bobnorton
Tue Sep 10, 2013 11:22 am
Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
Topic: Request for advice reference slipping clutch
Replies: 11
Views: 5442

Re: Request for advice reference slipping clutch

In theory the clutch springs should all be of equal strength so the clutch should lift and grip evenly. Mine did not. had to pack out 2 springs to get the clutch to lift and settle back properly.Also the pushrod can seize and not allow the clutch to settle back .
by bobnorton
Tue Sep 10, 2013 11:19 am
Forum: Squarecase Dry Clutch Engines > S2, MHR, 'Mille'
Topic: Request for advice reference slipping clutch
Replies: 11
Views: 5442

Re: Request for advice reference slipping clutch

In theory the clutch springs should all be of equal strength so the clutch should lift and grip evenly. Mine did not. had to pack out 2 springs to get the clutch to lift and settle back properly.
by bobnorton
Sun Jun 16, 2013 11:53 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: Just can't get it started!
Replies: 7
Views: 4383

Re: Just can't get it started!

My 250 needs to be dripping fuel to start, When i have not had a choke fitted and no tickler i used to lay the bike over to flood the carb, When it won't start what does the plug look like?,wet or dry?.
by bobnorton
Sat Jun 15, 2013 9:18 pm
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: Just can't get it started!
Replies: 7
Views: 4383

Re: Just can't get it started!

Should not flood (drip fuel) unless tickler used. Check that first, But my suspicion is poor ignition, duff plug,weak spark,points,check spark in the dark for blue color.
by bobnorton
Sun Jun 09, 2013 11:44 am
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: header interchange??
Replies: 5
Views: 3610

Re: header interchange??

Thats exactly what i'm saying, just because someone says they are Darmah does not mean they are.
by bobnorton
Thu Jun 06, 2013 10:21 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: header interchange??
Replies: 5
Views: 3610

Re: header interchange??

My GTS came with stainless headers and a reciept for Darmah pipes. they do not fit, they have insufficient kick up and foul the rear brake shaft,they also make removing the oil filter difficult. Its very possible that they are NOT Darmah. Just be carefull. They will be cut and welded.
by bobnorton
Thu Jun 06, 2013 8:30 am
Forum: Carburettor & Fuel System Shop
Topic: Accelerator pump non return valve test
Replies: 4
Views: 3257

Re: Accelerator pump non return valve test

Hmm--, need to think about that, my plan backfire's, just like the bike!.
by bobnorton
Wed Jun 05, 2013 11:25 am
Forum: Carburettor & Fuel System Shop
Topic: Accelerator pump non return valve test
Replies: 4
Views: 3257

Re: Accelerator pump non return valve test

Thanks Steve, yes its the one with the plastic ball . Ball is free but valve will not lift with my amount of puff!!.Found another way to measure pump output. Remove jet tube from side of carb, block hole thats in the throat , operate throttle and catch the fuel that pours out from side of carb and m...
by bobnorton
Wed Jun 05, 2013 3:23 am
Forum: Carburettor & Fuel System Shop
Topic: Float levels
Replies: 5
Views: 3384

Re: Float levels

Found a new way to check float level, Allow chamber to fill,clamp hose, remove chamber nut catching all the fuel in chamber. Should amount to 55cc. Adjust float to correct.
by bobnorton
Wed Jun 05, 2013 3:19 am
Forum: Carburettor & Fuel System Shop
Topic: Slides and ramps.
Replies: 32
Views: 12591

Re: Slides and ramps.

Could not get the new 60/1 slides to lift on the idle screws, was thinking Steve 's prediction was right, then noticed that the DPO had fitted stainless idle screws, wrongly made with sharp long points and not enough shank before the threads, a bit of hand file work and thats sorted.Screws are a bit...

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