Join Date: Oct 2006
The 685 will reduce the vibes substancially, but, how low do you let the rpms go down to? Are you lugging the engine? Just thinking outloud. There are three engine mount locations, front top and one long bolt in the rear that is easy to miss. They all need to be tight! The stock seat will cripple you or at least it did me......my daughter 115lbs says the stock seat wasn't great for her also, but after making a Corbin copy of their flat seat it is perfect. If you are getting vibes up the bars you can get ROX rizors with vibe cancelling mounts, expensive but cheaper than a 685 kit. The bike shouldn't vibrate as much as you are complaining about imho. I have a friend who said the same thing and after he tried my bike with the 685 he got me to install one asap into his and he is happy now.
As for M-Tech.....your call, not mine...I'd look for a shop local to you who does large singles or large twins....or someone like me who will do the work for you at a lower than shop rate in their garage.
I know of Wyman over at .net....he does exchange units but you have to do the work same as Eagle Mike. Mike would be my choice over Wyman personally.....I wouldn't get talked into anything but the 685 kit either. It is bulletproof.
Just a thought, how is your carb set up? Is it running perfectly and not stumbling? Have you done the carb mods? KLX needle, setting the pilot screw out to 2 1/4 turns out from seated? Maybe it's starving for fuel?
It's a wise move to get the 705 sleeve when you do install the larger piston imho, many may say it's overkill....but to each their own. I did it and had zero issues with my 685 until I screwed up and didn't clean the aircleaner and sand got past it and scored my bore. A bad day. How clean is your aircleaner and which is it? UNI is the one of choice of course properly oiled. What is the plug looking like, colour and gap wise?
I'm sure most of these are redundant questions but you should rule them out before spending on the 685 because if it is one of these then the 685 won't fix your issue.
Hope this helps.....