LTR jetting informaton

[MikeB]

Now please excuse my ignorance here folks. I have a LTR jetting kit for my MC250 99. I was sent a kit that included a -0 needle and a 42 slow jet, also a 172 main jet. (Middle position as well) My previous altitude was between 5500 and 6000ft. I don’t want to second guess Les but many of you previously said that this was to lean. Now I’m rejetting the bike for 500feet. I was told that I should go up about 2 steps in the main jet. (178) my question is does the new needle (LTR) require the bike to be jetted leaner/richer or the same. Any suggestions (main jet or slow jet or needle position)would be greatly appreciated.

MIKEB

[JoshP]

I'm riding at a 1000 feet and I using a 35 pilot and 175 main, which seems to be working good for me. Most I know are using a 40 pilot and a 175 or 178 main. Hope it helps and good luck.

[MikeB]

Yes that does help, THANKS.

KEEP IT COMMING!

[jeffd]

Hi Mike,

I talked to Les @ LT-Racing (LTR) - he is my best friend from childhood and I talk to him almost every day. I asked him to post a reply to you - but he said he had already responded to you via e-mail yesterday.

I won't tell you what I think you should jet - since I have been accused of spamming for my best friend's jetting kits (yes, I am very, very biased).

I will say that once you ditch the stock needle and get the jetting close at one altitude, then you can use the temperature and altitude correction tables in the back of the manual and it will get you pretty close.


jeff

[MikeB]

Once again thank for all the help. I know some of you get tired of the newbees but we really appreciate all the help, time and attention.

So thanks again.

MikeB

[JoshP]

Mike,
Don't forget about playing with the air screw, since you are coming from a place with much less air. Your Main (172) should be fine I wouldn't go above a 178 and your pilot go to a 40, keep your needle mid clip and start at 1 1/2 to 2 turns out with the air screw. You should be getting a nice even throttle hit out of that. Good luck with it.

[Brian VT]

More ignorance coming. Sorry.
'03 EC300 euro. ignition.
This summer I was running 178, 42, LTR #0 on 2nd notch down, #7 slide, 3 out on air screw, 40:1 Amsoil. Avg. 0-2500' elev.
I'm slow. I accepted a slight sputter off idle and an abrupt cut out of power on the top. I mostly ride low-mid rpms so I was content with it.
I just installed new reeds ("stock" Boysen). The old one weren't sealing quite perfect.
I rode last week and today in 20 deg. farenheit.
I ended up with the air screw at 2 1/4 out and everything else the same. The bike seems to be spot on. No sputter anywhere, it revs to the moon, the plug looks ok (to my untrained eye) and it will idle forever. I didn't check the plug at wot, though. I get scared up there. :-)
Just to experiment I put the needle clip in the middle. It ran like crap and blew spooge out the hose on top of the right side PV cover.
I put it back on the 2nd clip and I guess I'm set for the enduro in 2 weeks.
So, when it warms up in the spring, what direction should I head with this jetting ? My LTR kit said 178, 48, middle clip, 1.5-2.5 out at 60-80 deg. f. but my present settings make me think I'll need to be even leaner in the warm than I am now ?

[gasIdaho]

I was wondering why you went with the stock reeds as opposed to the Pro Carbon reeds? I'm getting ready to put new reeds on for the 1st time

05' EC300 - I'm running 168/45, LTR#0, center clip, #7 slide. I'm pretty sure this was set-up to run at 6000'. Much of the year I'm riding 2-4000' in fast desert terrain though so I'm thinking about going up in size on the main jet..possibly 172. I wonder what kind difference I will notice..if any

[Brian VT]

Originally Posted by gasIdaho

I was wondering why you went with the stock reeds as opposed to the Pro Carbon reeds ?

Actually, you're correct. I told my dealer "stock" reeds. I received carbon. They are not multi-level like my buddy's though.

[Brian VT]

I guess I can shorten my earlier question.
Is it possible that a bike which runs good on a 42 pilot at 20 deg. can also run good on a 48 pilot at 80 deg. ?