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Discussion Starter #1
im having trouble with the left side popping and running erratically. i don't know what happend. the right side is fine. i pulled the plugs and both look good. a little wet but ok. so i then pulled the plug wire from the left cylinder and checked out the right side. good. fired up and everything was normal. now i did the same for the left and it took 3 kicks...fired up and was popping and hesitating like crazy. then it died. what the hell happend?! i really need to get this thing running again asap. i've looked through all my books and can't find a damn thing on this. any ideas?

cheers

hely

74 Yamaha RD350 cafe
 

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Geeto....you do two strokes right?

I'm running my freshly started Hodaka around the back yard after it's 25 year vacation. It's got an aftermarket chamber on it....stock main jet in the carb. At WOT when the rpm get up there it gets a rapid fire miss. Lean miss? Doesn't sound eratic like an ignition problem. Haven't pulled the plug to check it yet.
Just got the bike, don't know a lot about it yet.
JohnnyB
 

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Discussion Starter #5
turns out i've got a bad plug. i swapped them and it was happening to the other side. i popped in some new ones and she fired right up. now however...i changed out the needle valve because i was leaking fuel all over the place from the overflow tubes. i pulled out the throttle, needle, and top. put them aside. then disconnected the middle tube, fuel, and air filters. i got the carbs off one at a time. turned the carbs upside down and pulled the float chambers off. i proceeded to replace the float needles being careful to put everything back together the way it was. while i was in there i also changed out the main jet from a 260 to a 250. anyway...i put everything back together and went to fire it up. nothing. again. nothing. i thought maybe i didn't have any fuel in the carb and in the lines so i left the tap open for about 20 minutes. then i tried it again. this time she fired up but the rpms shot right up to about 4000rpm and i immediately turned her off. so i checked the plugs and one was wet. let them dry and tried again. again the rpms shot up and i turned it off. so...i pulled them off again and made sure that there weren't any air leaks. now when i went to start her she tried to start and wouldn't. i checked the battery and it was dead. so now im charging it and am going to try again in the morning. now...as far as the rpm charge...what gives? where could i have an air leak? the boots? they were fine before i pulled the carbs off. please...anyone help me out.

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hely

74 Yamaha RD350 cafe
 

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Hely.
Check your slides, sounds like at least one of them isn't closing all the way. Did you get them reversed? Left slide in right carb?
Always check what you fixed last.
Ken

AHRMA 412
Vintage racing - old guys on old bikes
 

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Discussion Starter #7
i did each side one at a time to make sure that i didn't swap the slides onto the wrong side. i'll double check the slides but im almost 100% that they are both down. i just had them sync'd so i doubt that's the problem. at least i've got the leaking to stop.

cheers

hely

74 Yamaha RD350 cafe
 
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