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by Ivor Collins
Mon Oct 24, 2016 7:22 pm
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

That's good to hear the engine is performing as it should. Interesting to learn that just because it was starting ok, that was no indication the crank seals were intact!
by Ivor Collins
Sun Oct 23, 2016 1:53 pm
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

Hi Alan That's good you've put that issue to bed, you really don't need to concern yourself with a 3mm difference on the adjusters. But you make no mention of using the adjusters to align the rear to the front wheel which is, after all, what you need to achieve. The recommendation is to use a long s...
by Ivor Collins
Fri Oct 21, 2016 9:17 am
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

Hi Alan I had the same problem and posted some photos asking for help. The consensus of opinion was that it's not unusual for the bodywork to no longer be where it started and decided to live with it but you have got me thinking now. Think I may try setting the rear wheel in line with the front and ...
by Ivor Collins
Fri Oct 14, 2016 10:17 am
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

Hi Alan What awful luck, you must be feeling deflated from this run of problems. I had one with a sheared stud, and they always go flush with the casting it seems. I don't know if you have already drilled it but a carbide tipped drill will work well, you can even get them with a left hand twist whic...
by Ivor Collins
Wed Oct 12, 2016 5:13 pm
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

Yes, the crank to clutch sprocket, use a length of 1/4 dia. rod between them and a feeler gauge to check the gap. Providing this is achievable within the float of the crank it's fine. Despite the work done on the crank, you should still check the crank for true on installation before fitting the cas...
by Ivor Collins
Tue Oct 11, 2016 11:29 pm
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

Hi Alan Have you started by checking the drive sprockets are in line to within 0.010"? You then need to check with a feeler gauge, that there is a minimum clearance of 0.015" between the inner face of the crankcase and eack crank. It's prudent to push the crank to minimise the gap and chec...
by Ivor Collins
Sun Oct 09, 2016 6:47 pm
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

Well done Alan, shame you had to resort to a full strip down but at least it was not in vain and you have an obvious fault there. Lets hope its a cure but strange that it started so well and I wonder if removing each HT lead in turn would have revealed that all the work was being done by one cylinde...
by Ivor Collins
Sat Oct 08, 2016 9:51 am
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

I would be thinking about crancase pressure but if it's starting easily I think we can rule that out and anyway it probably going to turn out to be something 'simple'. Too much heat and insufficient power. Should we be looking at ignition timing again and I wonder if you have fitted electronic ignit...
by Ivor Collins
Thu Oct 06, 2016 5:28 pm
Forum: Two stroke
Topic: center crankshaft bearing
Replies: 17
Views: 2098

Re: center crankshaft bearing

Roger In the engine you stripped was there a crankcase seal in place as well as the sealed bearing? Does anyone know, did we not yet have sealed bearings at the time Leaders were designed? And what sort of pressure are we talking about here, probably less than 5 psi ? How about fitting another beari...
by Ivor Collins
Tue Oct 04, 2016 9:23 am
Forum: Two stroke
Topic: Lack of power
Replies: 56
Views: 5926

Re: Lack of power

I would think the four stroking is a result of the changes you have made to the carb settings and it may be running too rich now so try adjusting to leaner setting, but then check the plugs for colour

Ivor

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