XT660 to XT734cc
 

This is Kris007's conversion 660cc to 734cc.

Kev2 did all the machining for Kris today, all went well with with no glitches. Kris hopes to have his head back from porting next week with +1mm valves. So watch this space a new big bore coming very soon.


Kris's build.
734cc cylinder
12.5:1 CP Raptor Piston
Stage 3 Hot cam
+1mm inlet valves
Ported head
+3mm Throttle body
+3 degrees ignition advance, rev limiter moved to 7700rpm
+4mm headers
After market cans
DNA Stage 3 air box
PCIII
Heavy duty clutch

http://www.youtube.com/watch?v=WSacVZKhk4k


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Wow this is looking really good. Going to be one hell of a XT. You going to do drag racing with it?

I was also looking at this mod but heating I think will be a problem and I do to many long trips for it to work for me in a very hot climate. Will just stick to the 686 cc oversize piston.

Very nice mod though. :icon_thumleft: Cant wait to see the dyno tests.

Cooling should be fine Kris has an oil cooler already on his bike & we can make up a water cooler if neccessary.

868cc cylinder is easier you machine the 102mm cylinder & fit it straight onto the Xt660 cases.

http://www.youtube.com/watch?v=X6Qg_4Ef_cA&feature=mfu_in_order&list=UL

734cc cylinder is now on, just waiting for the ported head.

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The XT734cc is now a runner. :pjrflash_Q2CCBE:More news later.

holy sh|t! :wow:

cant wait to see the results... :woo:

Out of curiousity Kev, why stick with injection instead of a carb upgrade like a FCR or TM pumper?

Fuel injection is much better than carbs, you have better control of the A/F ratio with fuel injection. Most carbs have 6 points of adjusting the A/F ratio a power commander you have around 276 points of adjustment.

Well the results are out, Kris just sent me an SMS 74 rear wheel HP & 60 ftlb of torque.

Holy cow this is going to one fast XT, Kris will email me the dyno runs & I will post them as soon as I get them.

Well done Kris you have built a monster XT.