#31
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I've finally gotten my #8 slide installed on the 300 and I'm happy to say it has done exactly what it was supposed to do. The low end throttle response is completely clean and with my airscrew adjusted for the temp of the moment it runs as good as it can. Having the head redone might make things work even better, but for now performance of the engine is fully acceptable.
Color me one happy camper
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Jimbolaya 06 EC300 Grab life by the bars and twist! Last edited by jimbolaya; 09-11-2007 at 05:30 PM. Reason: spelling |
#32
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Glad it worked out for you.
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#33
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Thanks for the CCK suggestion. It is smooth.
I had gotten the head squish tightened up and although the milled head noticeibly improved the low end power , it also accentuated the flaws in the stock jetting. (#38, N1ED #2, 180) The hit right off idle with the stock jetting was then a handful in tight woods. The CCK will be a big help with smoothness. 2001 300 XC Last edited by jefgil123; 12-19-2007 at 07:11 PM. |
#34
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Now try the RB Designs carb mod. You will be amazed. The low end tunability range is huge. Top end is sick fast...
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#35
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Quote:
//Toni |
#36
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Toni. You can also try a N3WF or a N3YF , They are powerjet Kawi needles 99-02 I believe. The YF works very well in my 300 but when we tried the same in cactusreid's 300 it would barely run. I'm thinking it may be partly due to his needle jet being worn out of spec.
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#37
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FYI - keihin doesn't sell a replacement needle jet (aka nozzle) so there wasn't much you could do to compensate for wear in this part. Options were to try leaner needles or just throw in the towel and buy a new carb.
A while back, I mentioned this problem to Ron at RB-Designs and he came up with a solution. He is making up the replacement needle jets that keihin doesn't supply. This old "nozzle" needs to be pressed out of the carb and a new one pressed in. The jet block needs to be removed in order to accomplish this - so you have to send your carb to him to have the work done. I took a look a quick look at Ron's website, but don't see that he has the "nozzle update" listed - his other gasgas carb mods are listed here... http://www.rb-designs.com/gasgas250-300.htm jeff |
#38
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If I have access to these needles N1EC N1EF N1EE N1EG N1ED how should I jet to get my ec300 run best.
I would be glad if I would get some help in summer and winter jetting. I live at sea level, in summer time the temp. is round 18 celsius in winter -7. This summer I have used the following jetting. Slide #7 42 N1EF#3 175 With these jetting I have a slight hesitation when giving full throttle from low RPM's in the midrange. |
#39
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Quote:
I machine these nozzles from C360 brass stock. I do this repair for $25.00 plus return shipping and handling. Ron |
#40
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Quote:
The N3EG needle is an optional needle for an 03 Yamaha YZ250 two stroke. The needle for a 99 Honda CR250 part# 1369D it is identical to the CCK except it is 1/2 clip leaner. CCK#3 = 1369D#3.5 These may be easier for you to get than ordering needles from the USA. Dave Last edited by pobit; 10-30-2007 at 11:24 PM. |
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