De Restriction

[Jameswallace]

ho could i de restrict my ms50?

exhaust ?

thnks

[Jameswallace]

Rubbish topic starter by me

How could i de restrict it? is there any information abvailble? i cant seem to find any

Are there any other owneres of ms50's that could shed some light possibly?

I may pop the exhaust off and run it without it to see if it will go faster

[Airhead]

nahh dont run without it, it will make one hell of a racket and possibly perform worse...and with two strokes its not good for the engine.

Take off the exhaust and see if the header pipe is reduced in diameter at the neck of has any washer like restrictions in there, I wouldnt advise doing any more than that with your rare bike.

[Jameswallace]

ok, i shall have a looksie, probably best to order a new gasket and copper ring me thinks! just incase!

[drummerboy]

Hi, I'm new on here and new to 2 strokes but I am a qualified engineer so not entirely guessing at it!!

I would think the restriction is likely to be in the inlet manifold. If you have a look on the reed valve block it will have a circle with a line through it followed by a number. Mine says 20 and I'm guessing yours will too? Having measured the carb, 20mm is the choke size (the diameter of the internal bore of the carb). The area of that is 314mm2.

I took off the inlet manifold rubber piece between the carb and the reed valve and measured it - it was 20mm x 15mm : area is 300mm2

I'm not entirely sure, but I think if you could get a reed block and manifold piece with an opening of 20 x 20 then you would gain an extra 14mm2 (it is only a 5% restriction but a restriction nonetheless).

I might be barking up the wrong tree though!!

In any event, 2 strokes need exhaust back pressure to work properly, without it, the fuel charge would blow straight through into the exhaust pipe and would run even slower than it does now. So removing the silencer really isn't an option.