Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

Its great! Direct bolt on.my yz85 gained power.[...]

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

Wicked part, Goes well with the shorty pipe. one problem i had was it didnt quite fit on the header properly and leaks a bit

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

Offers noticeable increase power and response

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

Been in mx for 16 years, I've used Pro Circuit on every bike ive ever owned including pit bikes and quads, 2 strokes and 4 strokes. The power gain is phenomenal, and the look and durability are a plus as well. With a few jetting modifications the power gain will be quite noticable. The greatest power gain from a full Pro Circuit exhaust system was my YZ250, the instant i installed it i could feel it. Pro circuit is the leader in exhausts and will continue to be for many years to come.

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

pipe looks and sounds the best out of them all. will only use this pipe on a 2 smoker

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

Pro Circuit pipes are among the most supreme expansion chambers in the motorcycle industry, and the Works pipe for the YZ250 is no exception. The pipe bolts on in no time at all and looks phenominal, adding instant performance. The power spred is increased everywhere, especially in the bottom end. The pipe may need to be jetted, and Pro Circuit recommends the 2006 model be re-jetted from a 178 main to a 175, and the pilot from a 50 to a 48. This product is one of the best performance modification for any 2-stroke motorcycle.

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

Overall the product does help performance, but in all cases is not a direct bolt on without any modifications.

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

pipe adds alot more top a decent amount of mid and some bottom but matched with the r304 silencer your bike will be snapping your arms off in no time it gave my 06 yz 250 that snappy two stroke feeling i love it

Comments about Pro Circuit - 2-stroke Exhaust Pipe Works - Yamaha:

this is an amazing pipe cant go wrong with it."