November 15, 201411 yr hi, got a very nice clean ossa mar 1975 250. hasnt been used much. while we have owned it we have only used it on our drive and just had it stored . well anyway it runs perfect on flat but as soon as you twist the throttle and the front lifts up or you attempt to go uphill or up a bank. it bogs badly and will cut out unless you give it even more then it will roar up at high revs. and if you hold constant throttle for a few seconds say 1/4 throttle cruising then give it more then it bogs, again you have to give it even more to get out of it. seems to me it seems to be an issue with the floats in the carb. like there not adjusting when angled or like theres not enough fuel. tank has been cleaned and so has carb. any ideas?? also thinking about a OKO 26mm carb ( keihin copy ) i think this would really enhance it and make it sweet. would this fit straight in ? has any one used one and if so what jets would it need?
November 16, 201411 yr Mk 1 round bowl AMALs behave like that if there is a drop of water in the float bowl Edited November 16, 201411 yr by feetupfun
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