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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 08-27-2008, 07:56 PM   #1 (permalink)
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Affordable replacement for Amal carbs????

Hi,

I have a 1971 Bonneville 650 with twin 930 amals, 190 jets, and 3 cutaway.

I've cleaned, checked ports, changed floats, & adjusted seats, and the floats will still not seat the needle (nylon tips) all the time. Everything looks good.

Is there an affordable replacement carb to the amal. I found new amals are over $225 and I think there has to be a better replacement. I'm not looking for power, just simple reliablity.
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Old 08-27-2008, 08:06 PM   #2 (permalink)
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just replace the float needles with viton tipped ones bout $20 inc shipping .
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Old 08-27-2008, 08:28 PM   #3 (permalink)
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So from what you're saying, gas is constantly leaking out from around the tickler? Speaking of which, have you looked at the bottom of the ticklers? Could they be holding the float down (needle from seating) and flooding the bowls?

I have 930s, 626s and MKIIs. Never had problems with any of them.
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Old 08-27-2008, 09:26 PM   #4 (permalink)
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McQueen (not many people notice McQueen stole a triumph from the Germans in the "Great Escape"?), The tickler is fine, spring works good and doesn't hang up at all.

Woody, The needles have a black tip and look ok, I thought they might be nylon tipped. Where do I purchase the viton needles? Can the seats be bought also?

I'd like to find something better, I don't care about "original". I can put the old ones back on if I decide to sell it. I'm just not impressed with the amal, I've seen better carbs on tractors.
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Old 08-28-2008, 03:11 AM   #5 (permalink)
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ugh ... Amal actually manufactured carbs for some tractors.

That being said, I guess the definition of 'better' is subjective. The Amal concentric carb has very few moving parts, no diaphrams to dissolve, and are EXTREMELY simple. However, they do wear out ... so does a Mikuni after 35 years and thousands of miles. I'm not one of those originality snobs, I just can't stand this whole 'my OLD Amal is worn out so I need a NEW Mikuni' mentality. A NEW Amal would work just as well, if not better. I believe Triumph was winning A LOT of races on these machines with Amal carbs.
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Old 08-28-2008, 04:50 AM   #6 (permalink)
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Not sure which side of the puddle you're from, but heres some MIKs...

http://www.britcycle.com/Products/692/692_series.htm

Have to agree with the others, i have the original MkII Concentrics on my '79 T140 and they are great.
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Old 08-28-2008, 07:50 AM   #7 (permalink)
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Monty, Thanks for the link.

t100r, I didn't mean to offend anybody with the tractor coment. You are probably right the amal is a simple design and I may just buy some new ones. I'm just not impressed with the plastic float.

I'm an old car guy and this is my 1st old bike. I do enjoy working on it and appreciate all the help these forums can provde.

Thanks for the replies.
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Old 08-28-2008, 07:06 PM   #8 (permalink)
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For cheap carbs you could also try one of those JRC ones. I think GP has some experience with them.. but I'd stick with the concentrics if you can
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Old 08-28-2008, 10:45 PM   #9 (permalink)
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I've seen the jrc and have not found a price for a set. Looked at the jrc web site. and emailed and called a couple on the dealer list, but haven't heard anything back.

I think the amal carbs I have are fine, the needles, floats, and the seats seem to be the problem. The needles & floats can be bought but I think I'll need to find the whole bowl to get the seats. Alot of old car carb kits came with new seats, but there isn't a part number for the amal seats.

I ask if anyone knew of an affordable replacement for the amals because I don't want to throw good money away on something that won't be any better.
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Old 08-30-2008, 10:51 PM   #10 (permalink)
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10drum you could not sound more like me if you tryed. when i got my 68' bonne all i wanted was to get rid of the amal carbs, i was considering mikunis and switching the head for a single carb set up. what you have to do is find a person or place that works on these things all the time and get the carbs and everything back to square one. i tryed for months to get mine going but just couldnt do it till i found the hartz bros out of watertown ny and these guys know there s**t when it comes to amal concentrics. now it is easy to maintain and even better to ride it starts first kick and gets almost 40mpg. even with the way i ride it
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