Leader resto complete but alas a problem

Anthony Woolhead
Posts: 22
Joined: Thu Mar 14, 2019 11:24 am
Contact:

Leader resto complete but alas a problem

Postby Anthony Woolhead » Fri Dec 06, 2019 2:23 pm

I completed the resto on the bike including new rings on the pistons, the bores were in very good shape. All this was achieved for just over a grand and around 600 pleasurable hours of graft. However, it proved to be extremely hard to start and would only run on a high throttle opening.

This prompted me to strip out the crankshaft and replace the main bearings, which were in surprisingly poor condition. I also replaced the oil seals.

Now the engine starts much more easily but will only run on choke. As soon as I attempt to push it in it stalls. The carb was meticulously cleaned during the resto and the tank went round in my cement mixer full of gravel, washed out and sealed.

Any ideas would be very welcome guys.

Tony

User avatar
dave.owen
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 1414
Joined: Wed Mar 23, 2011 10:05 pm
Location: swindon
Contact:

Re: Leader resto complete but alas a problem

Postby dave.owen » Fri Dec 06, 2019 4:34 pm

Did you changed the crankshaft oil seals.
If older they may be hard and letting air in


Dave
AOMCC Treasurer

Anthony Woolhead
Posts: 22
Joined: Thu Mar 14, 2019 11:24 am
Contact:

Re: Leader resto complete but alas a problem

Postby Anthony Woolhead » Fri Dec 06, 2019 4:52 pm

Thanks for your interest Dave, I changed the 2 centre seals and the offside seal. The nearside looked in very good order.

Tony

bh.sprint
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 361
Joined: Wed Oct 31, 2012 7:21 pm
Location: South Yorkshire
Contact:

Re: Leader resto complete but alas a problem

Postby bh.sprint » Fri Dec 06, 2019 8:11 pm

Hello,

Just a thought -- Are the jets,slide and needle correct according to the book.

Brian H.

Anthony Woolhead
Posts: 22
Joined: Thu Mar 14, 2019 11:24 am
Contact:

Re: Leader resto complete but alas a problem

Postby Anthony Woolhead » Sat Dec 07, 2019 10:55 am

Hi Brian, although I have cleaned the carb on several occasions I never checked the numbers, it will be my next step.

Tony.

bh.sprint
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 361
Joined: Wed Oct 31, 2012 7:21 pm
Location: South Yorkshire
Contact:

Re: Leader resto complete but alas a problem

Postby bh.sprint » Sun Dec 08, 2019 7:25 pm

Hi,

I can't find any details in the manuals of the needle number/type but from a pencil note in my Amal booklet, the Leader has a B needle and the Sports Arrow ( 376 carb ) a C needle which I think is longer.

Brian H.


Return to “Two stroke”

Who is online

Users browsing this forum: No registered users and 4 guests