Sync/Tuning Tips

[kamp0ss]

Alright, I am getting my Carb syncing tool today.

 

I am looking for some last minute tips from people that have actually used this tool.

 

-Do I need to do anything to my throttle or throttle cable?

-Do I need to reset my idle screws? If so, to what?

-Do I need to adjust my sliders to anything prior to testing?

 

-What should I fix first the idle (with no throttle) or the sliders (with 1/8 throttle)?

 

My left pipe idles fine but my right one crackles a little bit. Would I be able to just tune the right one to match the left one or should I start from scratch and match up the idles and go from there?

 

Thanks.

[bansheesrtoys]

i have used the tool. first start by making it idle right. i think mine read like 5 on the scale, then set the slides adjustment. now on mine i was only able to open the thottle a little because too much would peg the scale.i have a thumb thottle and just srecwed the stop srcew all the way in. and yes if one side seems to idle where you want it them just make the other side match.

[SheezFast02]

I just did mine with the tool from F.A.S.T. (This is for PWK carbs so it may differ slightly from factory Mikuni's)

 

Carb Sync at idle

-First, remove airbox or pod filters, exposing carb opening, to allow the use of Sync Tool.

-Start by screwing in the cable adjustments on the carb tops

-Next, set idle screws for desired RPM's at idle

-Use Sync Tool to check vacuum on both carbs; adjust one carb to match the other until both carbs read same number on Sync Tool. (Back and forth several times to be sure)

-Once carbs are Synchronized at idle, move onto mid-throttle Sync, to achieve best mid-range throttle response.

 

Mid-Range Sync

-Remove thumb-throttle cap at handlebars

-Screw in cable adjuster at thumb-throttle mechanism to give cable as much slack as possible

-Use a screwdriver bit or anything of the appropriate size to wedge into the thumb-throttle mechanism to hold the throttle at a mid-range RPM (don't go too high)

-Use Sync Tool to measure vacuum from both carbs and carefully take up cable slack via the cable adjusters on carb tops, back and forth several times to be sure they're accurate.

-Once both carbs are synchronized to your liking, take up the remaining slack in cable via the adjuster at throttle mechanism, leavin approximately 1/8'' of freeplay.

 

I hope this helps and is as thorough as I intended it to be.