Problem Can-Am

A place for current or ex-Can Am owners to natter..
Brusher
Posts: 23
Joined: Mon Nov 09, 2015 1:48 pm
Location: UK

Re: Problem Can-Am

Post by Brusher » Mon Nov 16, 2015 12:49 pm

No,still same symptoms as before. I'm starting to think that there must be an air leak behind the valve cover... My logic is that if it revs better (but still not great) with the carb needle all the way UP (richest setting) it's normally running too lean due to an air leak, and the most likely place for that to happen is the valve cover. Carb rubber manifold is OK, exhaust system similar, so a process of elimination seems to point that way...would the people of knowledge agree?
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canam
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Re: Problem Can-Am

Post by canam » Mon Nov 16, 2015 2:20 pm

Have you changed the fuel from the premix running remix will affect the jetting lots.

Does the throttle cable have a little bit of slack in it.

I'm still 75% on the carb being the issue. Did you get the crank seals in the correct way around.
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Over-engineering replacement parts that were under-engineered originally by the manufacturer is the whole point of having a home shop.

Brusher
Posts: 23
Joined: Mon Nov 09, 2015 1:48 pm
Location: UK

Re: Problem Can-Am

Post by Brusher » Mon Nov 16, 2015 3:39 pm

Only used premix the once to eliminate the pump under/over oiling. Now back to regular neat petrol + oil pump. Yes, slack in cable to the manual spec.

LH crank seal installed "facing in" towards engine (I.E lips + spring on the outside -following advice) and RH installed in usual manner.
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canam
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Re: Problem Can-Am

Post by canam » Mon Nov 16, 2015 10:47 pm

Ok i think the needle seat is missing or wrong.

Is part 13,16,17,18 installed ok ?

ImageCan-am carb by Tony Crowe, on Flickr
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Over-engineering replacement parts that were under-engineered originally by the manufacturer is the whole point of having a home shop.

Brusher
Posts: 23
Joined: Mon Nov 09, 2015 1:48 pm
Location: UK

Re: Problem Can-Am

Post by Brusher » Tue Nov 17, 2015 12:54 pm

Parts are pictured in the sequence they came out along with markings. Are these the standard sizes?
The diffuser (13) is orientated correctly as per illustration. The Needle has two pairs of lines as ID.
Part 19 is not present although I can't see that being an issue?
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canam
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Re: Problem Can-Am

Post by canam » Tue Nov 17, 2015 1:02 pm

Brusher wrote:Parts are pictured in the sequence they came out along with markings. Are these the standard sizes?
The diffuser (13) is orientated correctly as per illustration. The Needle has two pairs of lines as ID.
Part 19 is not present although I can't see that being an issue?
DSC_0425.jpg
Jets look ok they need a good clean. Any other carb photos?

Where in the UK are you?
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Over-engineering replacement parts that were under-engineered originally by the manufacturer is the whole point of having a home shop.

Brusher
Posts: 23
Joined: Mon Nov 09, 2015 1:48 pm
Location: UK

Re: Problem Can-Am

Post by Brusher » Tue Nov 17, 2015 2:18 pm

As It happens, yes I took some more photo's!
As you can see, there's some sign of wear on the internals but the throttle slide is still a nice fit...
BTW, There's some cracks on the rubber inlet manifold but none of them all the way through.I did wrap it round with tape just to be in the safe side though.

I'm in The New Forest.
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mt bandit
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Re: Problem Can-Am

Post by mt bandit » Tue Nov 17, 2015 7:05 pm

is there any way you can wack another two stroke carb on there, just for elimination purposes
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Brusher
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Joined: Mon Nov 09, 2015 1:48 pm
Location: UK

Re: Problem Can-Am

Post by Brusher » Tue Nov 17, 2015 7:25 pm

Yes, that's the next logical step isn't it. I think I've got an MZ item knocking around somewhere...failing that I'll ring 'round some mates and see if I can track one down!
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canam
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Re: Problem Can-Am

Post by canam » Wed Nov 18, 2015 10:27 am

I would give the carbs proper clean the jets look dirty. Guaranteed there is dirt in the carb the slide also looks a bit worn.
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Over-engineering replacement parts that were under-engineered originally by the manufacturer is the whole point of having a home shop.

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