Laverda 750 sf2 doesn't start

[Perry]

Sorry. I was getting confused. Been working on my Guzzi
I was thinking of the wrong end of the rocker too. Having a senior moment I reckon.

Actually, my mind is somewhere else today. I'm a bit stressed about my cat. He's at the vet being operated on.

Anyway, now that I have a mental picture of the correct engine (I think), I doubt that the busted rocker adjuster would have prevented the bike starting. The valve wouldn't necessarily have been so out of adjustment that it wasn't opening. That would only affect one cylinder anyway. Perhaps Quentin might be on the right track. Valves not fully closing so it's not making any compression. Was there so much paper in there that it was holding the valves open? It would have to be jammed in pretty damn tight. Still got no clue what the paper was for.

Hope your cat is doing well. A good friend I suspect.

 

[Tippie]

Maybe he thought it was the inlet manifold.
Take out the plugs and use a finger over the plug hole to check for compression as tou turn it over by hand, and vacuum after TDC, will give an indication.

 

[ljen]

The Laverda green book could be very useful: https://www.abebooks.com/9780979689109/Laverda-Twin-Triple-Repair-Tune-up-0979689104/plp
Starting by the first 50 pages.

 

[Wido Veldkamp]

Woohooo! Problem solved it runs !!! As it turned out that he had tried to repair a broken stud for on of the valve adjustment covers. Therefor he must have taken of the head....that is probably why there was paper inside. But he didn't pay close attention to the timing marks on the camshaft sprocket.. this was no where near where it should be.....luckily nothing was damaged. Now its time to make it road ready again. Tnx all for the help

 

[helicopterjim]

Congratulations! A very interesting problem solving story!

Jim

 

[helicopterjim]

Very interesting looking exhaust system. Hoping you post more photos of your bike!

Jim

 

[Wido Veldkamp]

Very interesting looking exhaust system. Hoping you post more photos of your bike!

Jim

Here are some more pics of the system.

 

[helicopterjim]

Very nice system! Did you make it yourself? Very, very good quality!

Jim

 

[Wido Veldkamp]

Very nice system! Did you make it yourself? Very, very good quality!

Jim

Thanks, yes made it myself. Build a lot of stuff....www.wimoto.eu

 

[helicopterjim]

Thanks, yes made it myself. Build a lot of stuff....www.wimoto.eu

Ahhhhh .......... you are well known and you have made many exciting bikes! Well done.

Jim

 

[piranha-bro2]

Awesome looking SF2. Agree with Jim re the exhaust sys - very nice work!

I hadn't realised the motor had been out and worked on - otherwise I would definitely have included a cam timing check in the possible causes of the non-start.

 

[Dellortoman]

Wow! Interesting website. Some quality work there.

 

[Wido Veldkamp]

Wow! Interesting website. Some quality work there.

Thanks

 

[Wido Veldkamp]

Awesome looking SF2. Agree with Jim re the exhaust sys - very nice work!

I hadn't realised the motor had been out and worked on - otherwise I would definitely have included a cam timing check in the possible causes of the non-start.

Well the problem is luckily solved! Im a very happy man.

 

[Tippie]

Good that it is sorted. It would have had no compression. Not many people would remove the head to replace a broken cam cover stud.

 

[Wido Veldkamp]

Good that it is sorted. It would have had no compression. Not many people would remove the head to replace a broken cam cover stud.

No indeed....but yeah Alzheimer is so unpredictable. Anyway we found the problem and now can enjoy the bike this summer!

 

[Cosi]

We’ll I guess we should put that in the list of things to check, alzheimers is not funny but that did make me laugh