Motorcycle Repair/ttr 90


QUESTION: What is the best plug for my bike my engine is a ttr 5HN1 and can I cut the tip of my stock exhaust off and screw and aluminum silencer on? If yes, will I have to change my jetting or any other inquiries?

ANSWER: I think the  CR6HSA plug is Best and yes the re-jetting may need to be done
if the plugs burn white or there is popping through the exhaust.

---------- FOLLOW-UP ----------

QUESTION: What is the bestthing to do to make it faster and if the cam timing sprocket has the little notch in the center of it broken will it effect my timing

Don't take any Chances with the Cam Gear. Replace it.
Removing Restrictions from the Intake and Exhaust lets more air flow through
the carburetors and Increases Speed and Performance.
But these Modifications require the Carburetors to also be Modified. (Re-Jetted)
You might check to see if DynoJet make a Carb Kit for that Model and Year.

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william joseph stack


I specialize in Virago carburetors. Internal parts sizes, Needle and jet sizes for each and every year and model. Hitachi and Mikuni. I also can give tech support and Tech Support for carburetor problems and issues. Carburetor tuning and syncronization. Carbburetor rejetting and dynojet installations for engine modifications. I know every needle and jet size for every Virago made. I have done over50 Virago carb Salesand Rebuilds in 2012. I have over 50 sets ofVirago carbs in stockright now. I Build, Ride and Breath Virago. I have both the 1983 Midnight Virago's. The XV750MK and the XV920MK. 1 of my 1981 XV750H is is Premier Cycles, Billy Joel's Bike Museum.... I am an Honest and Fair man. I am also a Finicky Perfectionist withmy carb work. Ihave all the obsolete hardto find carb parts. I have new diaphragms, new floats, I have the float level setting down to an art. I have fabricated transparent bowls for both version 1 and version 2 carburetors.


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