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YZ400 shifting

10 posts in this topic

was wondering if any one else with the 400 or 426 has a problem with shifting from 2nd to 1st? It usually ends up in nuetral. I have tried using Torco synthetic oil and it seemed to help some , but it is still there. Is there another oil that might work better? Any Idea's would be grateful.

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Mine hits nuetral from 1st to 2nd but not 2nd to 1st. How old is the bike? This is my first yamaha dirt ride but I am familiar with their street bikes and when a yamaha bike is newer they do this quit a bit on street rides until they get a chance to kind of work in. Cant give much info. but just a little personal insight.

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it is a 99'. The guy I bought it from rode it for only six months, at least that is what he said. Then he had it garage for a year, do to an accident he had got in.Never being able to ride again. So I don't know exactly how many hours are on it. Oh yeah and it does do it from 1st to 2nd also, but seems to do it more from 2nd to 1st.

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My 2000 426 does the same thing, mostly when going from 2nd to 1st. Potentially dangerous when you do it heading into a jump, huh. Boit told me he uses I think a Bel Ray synthetic oil and this helped alleviate the problem mostly.

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Yes! This was a very annoying problem for a while. I'm one of those riders who tries to avoid a hard stomp on the shifter because I fear bending a shift fork. It didn't matter anyway, the transmission ended up in neutral about 50% of the time. The only way I could find around this initially was apply a slight steady pressure of about one second duration on the shifter instead of a quick stab. Then I read an article about Bel Ray EXS synthetic oil curing this problem. It took care of the problem for me. Also, this synthetic oil is fine for wet clutches.

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Yea, I'm having the same problem (hitting neutral going from 2nd to 1st gear). At first I thought it was my new boots , but after several hours I know its the bike. It seems to happen about 1 in every 5 times going to 1st. I'll try the Bel ray and keep my fingers crossed. Thanks Boit, by the way its an '01 with about 30 hours on it.

Mike

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Thanks guys for all the input. I will go get some Bel Ray oil tom. School Finals are over with so know it is time to ride. At least for a month until school starts again and riding time is limited.

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when i first got my 99 yz400 it used to do the same the more hours i logged on the bike the less it seamed to hit nuetral i also switched to bel ray exp 20w50 semi syn. it hardly does it anymore i think putting time on the bike helped the most though

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I have a 2000 426 it does this when I pull the clutch in to shift from 2-1 but if I just tap the shifter with no clutch I have no problems at all. I run yamalube on mine.

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YZman: That's what I have finally settled on as a technique to assure a positive downshift into 1st. I just make sure that I'm not too high in the RPM range before I notch it down into 1st to avoid overrevving. By not using the clutch, I can feel the positive click from the transmission and I know it has shifted into 1st. Haven't had ONE missed shift by doing this and I don't believe it's hard on the transmission.

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