2011 Sixdays 300

[thumperrider1]

My 250 has the 38. What would be funny is if I go to rebuild it next year and find it has a 300 jug on it. LOL!

[biggstr6]

Mine is a SD300 with the 36mm and it had the handlebaar choke (I switched it).


I just hope there is no performance loss with the 36mm . It seems it may be harder to jet right or so it sounds from people.

My 08 ec300 has the 38 and it will lift the wheel whenever I want it in 1,2,3, maybe even 4 th don't remember, but that could be a combination jetting and 2k2 ignition.

**Also wondering why the spec sheets said they came with the 38mm then they show up with 36's .Thats the one thing about gasgas thats irritating, not alot of standardization makes it hard sometimes.

[thumperrider1]

Let's try my JD blue needle in there. Bring whatever spare jets you have.

[ScottyR]

I checked 2 of my shop demo bikes and 1 has a 38mm (handlebar choke) and 1 has a 36mm (choke on carb).

Funny. I rode them both last week and thought that the one with the 36mm was faster but I was thinking it was because the gearing was different on them. Now I need to try the exact same gearing on both and compare.

I am strongly considering pulling the 38mm off "my" 250 and putting the 36mm on it.

[E-TECH]

Looks like alot of bikes might have been shipped over here without carbs and they had to use what they could find. My 11 300 6dys has a handlebar mounted choke. It came with a 40 pilot. A N1EF needle and a 178 main. The slide is a #7 and does not have a notch. It seems like alot of people are having jetting issues here ... me included! It may help us if we take notice on the # on the slide and if its notched or unnotched though I am not sure how 36 & 38mm play into it yet. I havent looked to see what size mine is. Can someone tell me how to find out? Les Tinous told me to use a 42, an N3EJ from a YZ 250 and a 180 main. This was too lean for me at idle and up to 1/3 throttle. The N3EH and 45 pilot seemed to be real good BUT when I opened the throttle wide open and low rpm the bike gurgles and blubbers like its drowning in fuel until it gets to the mid range then it blast hard! Is anyone else experiencing this? I'm afraid to go any smaller on the main as ringing the bike out hard wide open in open spaces it definitely does not seem rich. Hopefully getting the head cut by RB Designs will fix my issues.

[biggstr6]

The size should be stamped right on top the carb.

I have a 36mm with the 6.5 notched slide, and it was blubbering pretty bad even after i dropped the needle ,however rode some today and seems alot better than it was for some reason . Only has 3 or 4 hours on it ,but it definetley got better. Dont know if its quite there yet though .

I ordered 2 yz needles yesterday the J & the the W . Well see

Jeffs 250 has the 38mm carb , and has the handlebar choke on it and that thing rips like a mx bike.

[toolmaker]

My 36 carb has the handlebar mounted choke.

[Tlineman]

I have an 11 EC300 with a CCK needle, #3 clip pos, A/S 1 1/2 turns out, 38PJ and a 175 main. My bike rips, runs crisp, clean, has discoloured the pipe a bit, (has turned it a little yellow), but plug checks show almost a little rich. My buddies identical bike, same year, model, everything. Will not run very good at all with this jetting. Both bikes have 38mm ASII carbs, the only difference is I got rid of my handlebar choke and put a YZ250 one in. Any ideas? Are these things that different in jetting that they are going to need this specific of jetting?

[thumperrider1]

I toyed with jetting yesterday. Installed a JD kit for a YZ250. I have the 38mm carb.

My bike stock had a 40 pilot, 180 main, and the N1EF. It ran pretty good stock. It had a slight surging when it got hot.

The JD kit is the ticket. The bike gained more bottom end and is extremely crisp and rips up top.

JD Red Needle/ 3rd clip
45 pilot
172 main
AS 1.5 out

If one of you guys wants to try my kit before you buy then let me know.

[biggstr6]

So Jeff, That toned down the hit alittle? Before your bike would have been a bit much for me in the tight stuff.