Dynajet jetting question - Kawasaki KLR 650 Forum
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post #1 of 6 Old 05-19-2013, 08:01 PM Thread Starter
2nd Gear
 
Join Date: Sep 2009
Posts: 257
Dynajet jetting question

Should have the dynajet kit this week and plan on installing the new needle upgrade and possibly main jet.
Question: what needle clip setting is a good starting point as well as Main jet?

The elevation i ride can range from 3500-5500, with the occasional higher elevation ride.
Thanks
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post #2 of 6 Old 05-21-2013, 05:38 PM Thread Starter
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Join Date: Sep 2009
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Follow up: So, the kit had suggestions on what jet/needle settings to start with depending if the bike had an aftermarket exhaust and or airbox mod. I went with a 150main (stock is 145) and the needle in the 2nd from top position. I did not drill out the slide as suggested, too scared i guess.

First impression: The bike no longer pops and sputters when using the engines compression to slow down, this was and indication of a prior lean condition i believe. And I honestly can not say for certain if there was an improvement in throttle response, this was never a complaint before. But the backfiring is all but non-existant now and that was my biggest complaint.
The plug is such a PITA to remove otherwise i would pull it and check the condition, maybe some other day.

I was able to do the upgrade without removing the carb, only because i would have had to remove one of the crash bars, and i also couldn't figure out how to remove the choke cable carb side. The rubber diaphram was a [email protected]# until i put some axle grease in the groove to keep the diaphram down until the screws could be put in. Beware, that black plastic cap is spring loaded and will pop up like a jack-in-the-box if you're not ready, like i was. The job probably took me about 3-4 hours, half of which was dealing with plastic and tank.
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post #3 of 6 Old 05-21-2013, 08:03 PM
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Join Date: Oct 2011
Location: Lac La Biche Alberta Canada
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Drilling the slide allows the slide to move faster, quickening the throttle response. It doesn't affect the mixture and many people never do it. If you do, don't be afraid, even if you mess up totally it is only about a $30 part. Some have even epoxied the hole closed and redrilled when they messed up. Just don't drill any bigger as this will cause the slide to flutter/pulsate at higher RPM.
Regards....justjeff

It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Woooo WOOOOO!!!!!
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post #4 of 6 Old 05-30-2013, 07:44 PM
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Join Date: Jan 2013
Location: Vancouver Island, BC, Canada
Posts: 24
I did the stage 2, pretty happy but I did go down to the #150 main from the #155 as I was a bit rich. What a pain to access tho, on my Norton I have an old Mikuni which is a 5 min. job to change. The slide drilling was much easier than I thought it might be. Also the dynojet sizes are much bigger than the stock jets, my #150 is eq. to around #165 [ roughly, can't remember] of the oem ones, there's a comparison chart on the forum. Ride on!

1973 Norton Commando 850 [ since '82 ]
.040" over - mikuni 34mm - dual fire single coil

1993 Harley heritage softail [ since '03 ]
S&S 96" [ in '10 ] - V&H Pro-pipe

2011 KLR 650 [ Dec. '12 ]
EM Doo w/ torsion spring - Hindle stealth muffler -
dyno-jet kit - snorkel & L-mod - T-bob.
Various Japanese & British since '71 - Ride on!

Last edited by Threebike; 05-30-2013 at 07:47 PM. Reason: added more
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post #5 of 6 Old 05-30-2013, 07:59 PM
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Join Date: Oct 2006
Location: Pefferlaw,Ontario
Posts: 1,636
IMHO....and that is all it is.....that main jet size is huge! If in fact it is equal to a 165 stock main size! I haven't heard of anyone using such high numbers. Watch you don't wash your cylinder with too much fuel and glaze it. If you know what I'm getting at. Man that's rich! You are roughly at the same elevation as I am, I run 145 main jets stock numbers and can get a bit of suet if you don't set it up right.

It's your bike and your decission but WOW!!!

Willys
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post #6 of 6 Old 05-30-2013, 08:17 PM
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Join Date: Jan 2013
Location: Vancouver Island, BC, Canada
Posts: 24
Yeah, I was suprised too when I saw the conversion chart, the kit actually says use the #155 [ with K&N, door off the airbox]. Been running great, just changed it down because of a bit of black in the exhaust tip. We'll see how it is when the summer gets here.

1973 Norton Commando 850 [ since '82 ]
.040" over - mikuni 34mm - dual fire single coil

1993 Harley heritage softail [ since '03 ]
S&S 96" [ in '10 ] - V&H Pro-pipe

2011 KLR 650 [ Dec. '12 ]
EM Doo w/ torsion spring - Hindle stealth muffler -
dyno-jet kit - snorkel & L-mod - T-bob.
Various Japanese & British since '71 - Ride on!
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