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Old 11-16-2012, 06:05 PM   #16
thegraydog OP
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Okay, I will go see what carb it is.
Not to be defensive, but just to set the baseline: Joe ain't just the neighbor. Colorado enduro champ in, oh, probably the sixties. Our best local mechanic for a quarter century. And his son Pat, also a national treasure, had the same Beta until a couple months ago.

So any incongruities in this discussion are mine. I'm having one conversation with the bikes, another with Joe, and another with you-all. And I'm a carpenter, not a motorhead. Thanks for the encouragement.

You'd get along great with Joe.

Mikuni.
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Old 11-16-2012, 06:21 PM   #17
lineaway
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Quote:
Originally Posted by thegraydog View Post
Okay, I will go see what carb it is.
Not to be defensive, but just to set the baseline: Joe ain't just the neighbor. Colorado enduro champ in, oh, probably the sixties. Our best local mechanic for a quarter century. And his son Pat, also a national treasure, had the same Beta until a couple months ago.

So any incongruities in this discussion are mine. I'm having one conversation with the bikes, another with Joe, and another with you-all. And I'm a carpenter, not a motorhead. Thanks for the encouragement.

You'd get along great with Joe.

Mikuni.
I understand why Joe jets the way he does. I have worked with and know plenty of great mechanics, some national champs of many forms of motorcycling. I also know what works in a Beta.
So if it was his bike, how did he fix the carb from over flowing? It was always a problem so wodering if you are starved for fuel also?
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Old 11-16-2012, 06:36 PM   #18
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Mmmm, I'm aware that Betas parked at any angle piss fuel. You gotta fix?

(Corxn: Pat had an identical Beta, bought the same day same shop, but not this bike....)

So. I have this Beta, messing with it for education. What should I look at next? I think it is now a healthy bike; your post #10 makes a ton of sense.

You want to put your hands on it? I'll be coming over to San Y sometime this winter...
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Old 11-16-2012, 06:54 PM   #19
lineaway
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http://www.trialscentral.com/forums/...3-mikuni-carb/
Knock yourself out, this has been going on for years. Seriously you need a 135 and a 30 pilot for the jetting. If you make it over, I`ll give you my 2 cents!
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Old 11-16-2012, 07:15 PM   #20
thegraydog OP
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Oddly, this bike has always started first kick, even after months -- like a Honda vegematic.

Okay, I'm gonna get the jets, and I'm gonna come see you.

BTW, good to hear (Garrett?) got the fire. There is a steep spot in the learning curve, or fitness curve, that is pretty fun to ride or watch. Ah, youth.
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Old 11-16-2012, 08:40 PM   #21
DrKayak
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I stopped my Beta from leaking fuel by puting a fuel filter on it. It has only started that leading when on the kickstand a very few times since adding the fuel filter. When it does I turn off the gas and run it dry then turn the gas back on and no leak. I think that carb is is very sensitive to dirt getting in the float needle.

Mine came with 27.5/145 jetting. Going to a 30 pilot made a huge difference in the way it runs. I live at 2,000ft and our club has property at 6,000ft. I think it runs great at both altitudes. Never even had the plug out of it. Best behaved 2T I have ever owned.

Never considered dropping the main to 135. Would that be too lean at 2,000ft?
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Old 11-17-2012, 04:52 AM   #22
lineaway
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Yes, a 135 would be too lean at 2000ft. We are talking riding around 7000. You might get by with a 140, but it will be close depending on your bike and how you do the air filter.
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Old 11-20-2012, 08:49 AM   #23
BikePilot
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Often at high altitude it helps to cut the head to increase compression to get cylinder pressure back up to about where it'd be at sea level.
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Old 11-20-2012, 09:07 AM   #24
laser17
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I know you said you machined some weight off the flywheel - but did you ever check for the optional FWW under the clutch basket? Some of the 250's had these mounted in seemingly random years. May explain the super slow revs. I think they added an additional couple of lbs!
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Old 11-20-2012, 07:33 PM   #25
thegraydog OP
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Laser, I'm off to see my gurus tomorrow. I will present this conundrum....
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Old 11-20-2012, 07:53 PM   #26
lineaway
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I can`t wait till I get to ride this Beta Dog!
P.S. I have not heard of anyone taking that much weight off a modern bike, since they now use plastic in the crank itself!
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