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MairisLV

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  1. Thanks Robbo. Ok, I will measure the compression this weekend. I have twin exhausts, but the mufflers are joined together. Ok, I will try to check cylinders like that. The rubber inlet manifold is brand new. My old one was cracked and splitted.
  2. Thank you, but Airhead I've checked and cleaned the carb again and again... Robbo176 I've checked both spark plugs with spark checker and they are fine. Coil and lead I didnt check, because I checked if there is spark by removing spark plug from cyl and put it to cyl side and cranked engine a bit. The spark popped every second time the piston was up. I tried to change leads places, and that didnt help either. About compression - how many bars should i get?
  3. Hello. Ive just registered here because I have just spent my knowledge. 3years ago I bought Sachs Roadster 125 bike, with Yamaha XV125 engine. I imported it from Germany. Bike worked smooth and without problems. After first few months of use, which were last moths of summer, I started basic maintenance. Air filter, oil filter, oil, ignition plugs. Then I discovered, that rubber tube from carb to air filter box was completely broken, like in half. But, I thought - nothing to worry, theres winter ahead, i have time. Throughout winter Ive changed oil, filter, repainted bike, ultrasonic cleaned carb... but couldnt find that rubber tube. Then I bought universal "sports" air filter and started to experiment. And voila - I put over the filter foam sock and the bike started to run smoothly again. But then I didnt pass technical inspection because of my shock absorbers, and the bike remained untouched for about 1,5 years. Last summer I found a shop in Germany, where i could find many of much needed parts. I bought a new air filter box with the rubber tube included, new original air filters, new carb intake manifold, shock absorbers and more... When I returned home, I immediately fitted bike with all new parts. And YES! It runned perfect. I even passed technical inspection without problems and got pass for 2 years. Bike started, runned like a charm. I even got up to 65mph(110kph) speed. And then the nightmare started... At first it was nothing serious. Engine just started to start with bit difficulties. But with time it just got worse and worse. Now I can barely start it. RPMs are climbing very slowly, like if only one cyl worked. And then, very often, i hear pops coming from carb. When I try to ride, there is no power. I struggle to get 25-30mph(50kph). And very often the pops continues. Sometimes the power sudden comes back, but just for a short moment. Could someone please help me? Any info would be much appreciated. Thank you
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