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XS750 Big Bore
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Posted 2013-07-29 2:42 PM (#124673)
Subject: XS750 Big Bore


Posts: 13

Location: Dallas, TX
Hi Guys,

I am kinda new here so pardon the naivety of my question. I am wanting to install a big bore (900cc) kit to my XS750 and was looking for a step by step approach to achieving this. I saw a couple posts on the topic but they tend to veer off topic or in to mathematical equations and I can’t keep up.

Below is as far as I have gotten for the conversion:

1. Cylinders from an xs850
2. Wiseco big bore kit for XS11
3. Bore the xs850 cylinders to 74.5
4. Keeping my MK11 carbs and re-jetting to 132.5 mains, , 1 step larger pilot jet - a 45 from memory. Idle mixture set with color tune 2 3/4 turns out. Float heights set at exactly 25mm. This set up offered the best overall performance and smoothest transitions through the range
a. Copied from Redmans post back in 2008
5. Do I need to work on the transmission any?
6. Exhaust is currently a 3-1 (straight pipe but I plan to quiet it down a little in the future). Should I go to 3-2? I plan on making the exhaust as I get to that part of the build.
7. Is there anything that needs to be done with the crank?

Like I said, I'm new to posting and new to building so if any of you guys are in Texas (Dallas area) I'm looking to learn.
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