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I assume this is cheap pwk copy? I have fitted a koso to my m159 (325) Bultaco, after bit of jetting it runs well. When I fitted it it flooded and I had to bend the float tang to cure. I only really wanted to see if it would work as the standard Bing was stuffed. I know people will say they are rubbish, but it is a cheap way to test if a Keihin would work
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1/2 inch AF open ended will be a good tight fit on 13 mm nut?
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Have you looked at these?
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It's probably a 200 cc whitehawk, instead of short studs and sleeved head bolts they had full length studs and ordinary nuts on the head. Have a look at the spigot on the barrel, if its very thin its a 200cc barrel
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Have a look at the swinging arm slipper pad, the chain can clunk on that if its worn badly
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Wow lookat the torque curve ln the gas gas, near vertical from about 1500 to less than 2000 rpm. I've found the gas gas 300 pretty rideable actually, the 300 beta however i find tiring to ride, be interesting to see the figures for it.
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https://www.facebook.com/groups/1422481697978753/?ref=share_group_link
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Have a word with Steve Bamford at Casa montes trials holidays Southern Spain Facebook page
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I always put a thick washer between the frame and silencer tabs also
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I am 71 and still riding, i started trials at age 16 in 1967, so i say carry on as long as you enjoy it.
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May not be relevant but worth checking, had similar problems with my Evo, when i took the trigger/ pick up coil off to check the stator there was a lump of dirt/ grease on it, i cleaned off with solvent and lo and behold everything was fine again
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Evo totally different bike, huge improvement went ftom rev3 to evo and was gobsmacked
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As someone who rides motorcycles almost every day and also an agricultural quad with thumb throttle every day, I can't say i notice much difference in "controllability ". I will say though that in the situation described I use the clutch rather than the twistgrip on my trials bike to "check " after blippkng over an obstacle, still I applaud your inventiveness
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You could try the universal bar risers off flea bay, they clamp into the existing mounts and then the bars clamp on top, the have removable inserts to allow for normal or fat bars
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Just did a quick google check, here is the official blurb What is the ethanol content of your fuels? ... Esso super unleaded petrol (Synergy Supreme+ Unleaded 97 and Synergy Supreme+ 99 ) is ethanol free (Except in Devon, Cornwall, North Wales, North England and Scotland).
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Maybe of interest to folk with fibreglass tanks, Esso do an ethanol free fuel, 99 octane, i think its called synergy 99 it is ethanol free in most parts of the uk, but not all so check your area
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Too true, now 70 and riding when i can hopefully
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Has the sump had a bump recently? I have known hitting the sump on a log or rock dislodge the clutch case gasket.
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Seen this mentioned before, all I can say is I've had 5 betas over the years, never had one jump out of any gear, and never had to replace a mudguard either. There are a lot of beta's in my area too and never heard of anyone else having s problem, strange?
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Have a word with Steve Bamford at Casa Monte's trials holidays. He is in Andalucia, I remember him saying Spanish license is very expensive, 3 to 4 hundred euros, think he used to ride under ACU license ?
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Not sure if it was the same problem, but a mate of mine rebuilt my front wheel for me with new nipples on original spokes and he said he had to run a tap through the nipples to get them to fit properly, he made the tap by cutting a slot in an old spoke!
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Allen millyard has some videos on his you tube channel showing how he splits and builds up crankshafts for his multi cylinder specials
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