How to mod a MS290 Muffler

I mod the muffler on my freshly rebuilt 029/290 that has a cross performance cylinder and cross performance popup piston. I test before and after.
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Please watch: "Kubota BX Grading and Filling Hole"
• Kubota BX Grading and ...
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[@billyferguson8367]

Tried it. It works. No it works GOOD! Thanks for the tip!

[@TractorTech]

Your welcome. Be sure to adjust your carb after the mod to keep from burning the saw up.

[@budgillett9535]

Very simple and to the point. THANK YOU from Nebraska.

[@TractorTech]

Thanks for watching and commenting.

[@virgilmerchant5291]

I did this yesterday on my old 029 WOW what a difference..

[@TractorTech]

Yeah it really helps.

[@jimlyndoe2927]

Just think how it would cut with a sharp chain.

[@Igotknobblies]

I've just done mine, but not taken the centre part out. 2 strokes rely on back pressure to stop half your fuel exiting through the exhaust. The chamber is a calculated volume (hence huge exhausts on large 2 stroke motorbikes). Enlarging the silencer holes will reduce outgoing restrictions making it louder and more powerful but not affect the back pressure. Do adjust your high revs and mixture on carb settings or you'll burn out the piston.

[@TractorTech]

This mod picks up a little better than 20%.

[@BAKERHUSKIE]

Nice

[@TractorTech]

Thanks!

[@johnmccomb43]

Chain is dulllllll

[@TractorTech]

Thanks for watching.

[@Rick_Sanchez_C137_]

Did you adjust the carb at all?

[@TractorTech]

Yes, the carb needs readjusted after a muffler mod.