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I’m about to do the crossover intake and 12 hole mod . What main jets do I need ? And where can I get some?
 

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Sudco.com and jetsrus.com are two sites that sell jets for the Keihin CVKR32 carb. Sudco has a huge catalog online and I honestly don't know how to order from them beyond calling direct. I've ordered several times from Jets R Us using PayPal and the ship items out quickly. This is the page with the jets for the KFX 700:

KEIHIN ROUND MAIN JETS 99101-393 Jetsrus

This is what I came up with for the jet sizes based on the altitude ratios on the repair manual:

Front​
Rear​
Keihin part #​
Stock
#135​
#140​
019-192 & 019-194​
+1
#138​
#142​
019-193 & 019-195​
+2
#140​
#145​
019-194 & 019-196​
+3 (HMF full exhaust system recommendation)
#145​
#148​
019-196 & 019-197​

If you find it starts backfiring on deceleration after the mods and you need to go up on the pilot (slow) jet, the stock is #40. The attached image shows the part numbers for those. You usually only need to go up one or two sizes on the pilot jet to fix that issue.
 

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start at front 184 and rear 186
then check plugs and jet down
buy 2 of each 180-186
ours ended up at 182 front and 184 rear
dmc duals, 12 hole mod, crossovers
 

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I’m about to do the crossover intake and 12 hole mod . What main jets do I need ? And where can I get some?
Just installed a crossover intake a few months ago. You need to go bigger. The recommended size to me was to use a #43 size drill bit to drill the main jets big enough. Closest you can get with pre made jets is 230.
 

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he needs a #14 and #13 drill bits or the jets 186-182
someone else's dyno run

I went to 185-185 needle 4th clip 40 pilot. it was perfect all the way thru!


51.40 RWHP
 
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