July 23, 200620 yr Hi All, I bought one of the Repsol Limited 4RTs, in that one there were Three Ristrictors in the Exhaust System, one at the exhaust port from the Motor one that is between the Header Pipe and the Muffler and one at the end of the Muffler. I've taken them all out, It Idles real low without a sound but really barks when you get it to almost full tap, I've found that in the airbox there is the flame arrester covering the airfilter, I've taken the gauze off the frame so it can breathe alot easier, Frank van Heerden VIVA MONTESA
July 23, 200620 yr Author Yeah, If the engine spits back through the inlet tract, the flame front can travel 'backwards' towards the air inlet, seen it on cars with high overlap cams and no air filter - it's a bit unnerving seeing blue flames coming out of the carb - this would be a shocker on the 4RT - a fireball heading towards yer bum!. Anyway, a coarse mesh screen stops the flame progressing, it is either sustained or burns out at the mesh, it moves no further . A couple of people have told me removing this flame trap improves the breathing of the engine, I just don't understand how a coarse grid like that could throttle the motor more than the fine oily foam just upstream of it. Spoke to one of the guys with the Ohlins shock today, Said it was around Edited July 24, 200620 yr by GII
August 26, 201313 yr Has anybody got a picture they could upload to show where the inlet restrictor is please, and what it looks like?
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