do u know about yamaha atcs?

[ilovemja]

i have a 1984 yamaha tri moto 175 2 stroke, but i have a few problems first one is what is the proper spark plug to be in it? and at low rpms it bogs out and has no power and usualy stalls but at high rpms it works excellent, what is this caused by, thanks

[threewheelin-feelin]

well i do know yamaha didnt call there 3wheelers atc's lol that all honda

[AirManCam]

The proper plug is BP6ES...just look in your denniskirk book in the back for plug sizes :p

[Yamahammer490]

For what it's worth, Yamaha only make the 175 for the 1982 and 1983 models years, so yours isn't an 84. (I only mention this out so you don't waste time looking for information that doesn't exist. :) )

For both model years the original plug was a NGK BP-7ES according to Yamaha's web site.

The problem you described could be jetting related. I would check that first.

Good luck. There are a few guys on here with 175s so they may be able to shed more light on the subject too.