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Author Topic: Wats the difference between a YZ250C and a YZ400c apart from motor  (Read 2710 times)

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Offline oldyzman

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Wats the difference between a YZ250C and a YZ400c apart from motor
« on: August 23, 2011, 05:24:29 PM »
Just wondering is there any difference in the roller between the two bikes.
Cheers
Brett
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IT400C

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #1 on: August 23, 2011, 05:34:29 PM »
Apart from engine number (509 vs 510), I believe they should be the same...
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Offline Davey Crocket

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #2 on: August 23, 2011, 05:50:31 PM »
Front engine mount is diferent, exhaust, rests the same.
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Offline Iain Cameron

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #3 on: August 23, 2011, 06:48:02 PM »
the eng mounts are the same Davey its the 77 D that are different . Its just the carb to airbox joint , exhaust and mufler and stickers on the tank . Iain
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Yamaha tragic ; dt1, rt1, dt2, rt2, dt2mx , rt2mx , mx250, mx360,sc500, 74dt125, yzx125, yzc250, yzc400, yzd250, yzd400, yzh250, yzh80 , dt100 , xr75 ko xr80 03 , it175 82 . Not a member of any club

Offline oldyzman

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #4 on: August 23, 2011, 07:15:43 PM »
Iainyz, seems like you have both of these bikes, thing is i have recently got myself a bike was supposed to be a yz400c but it has 509 frame and 510 motor- not a bad bike on the whole, funny thing is the eng number is very close to the frame number just the last digit is different apart from the 509, 510 thing.
Brett
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Offline Davey Crocket

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #5 on: August 23, 2011, 07:39:48 PM »
I'm pretty sure the front engine bracket width is diferent....especially since I have just rewelded a frame that had had the mount cut, I cant remember if it's the top or bottom mount thats a different thickness.....could be wrong though.
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Offline oldyzman

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #6 on: August 23, 2011, 08:35:03 PM »
All good lads, the engine mount really doesn't matter that much to me, its a bit of a relief that the rest is somewhat the same between the models, still a bit unpleasantly suprised that the whole thing is not YZ400C as advertised. But thats ebay and i have to accept the bad with the good, its all part of the game. Started it up today for the fist time it sounds really strong and quiet in the motor. Fubar noisy at the exhaust but.
Brett
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mx250

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #7 on: August 23, 2011, 08:55:44 PM »
Quote from: Davey Crocket on August 23, 2011, 07:39:48 PM
I'm pretty sure the front engine bracket width is diferent....especially since I have just rewelded a frame that had had the mount cut, I cant remember if it's the top or bottom mount thats a different thickness.....could be wrong though.
The DT400 is wider at the mounts because of rubber bushes, (if that's helpful or asked for :P).
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Offline steveo247

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #8 on: August 24, 2011, 07:12:07 PM »
oldyzman was it the one from ebay around 2 months ago?

The guy wouldnt give me the engine or frame numbers for that bike, sounds like now we know why.
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Offline Iain Cameron

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #9 on: August 24, 2011, 08:06:52 PM »
The standard mufler on the 76c was worse than useless once it burned out the packing , You can cut the end cap off repack then reweld . this makes a vast improvement . love to see some photos Oldyzman.
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Yamaha tragic ; dt1, rt1, dt2, rt2, dt2mx , rt2mx , mx250, mx360,sc500, 74dt125, yzx125, yzc250, yzc400, yzd250, yzd400, yzh250, yzh80 , dt100 , xr75 ko xr80 03 , it175 82 . Not a member of any club

Offline oldyzman

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #10 on: August 24, 2011, 08:43:32 PM »
Yep i will get the photos on soon, is it possible to paste photos on here. I have allways had an issue with that...
Brett
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Offline jimg1au

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #11 on: August 24, 2011, 08:44:33 PM »
BRETT
send them to me i will post them for you
jim
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Offline farmpro

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Re: Wats the difference between a YZ250C and a YZ400c apart from motor
« Reply #12 on: August 26, 2011, 11:22:04 PM »
Sorry I'm getting in on this a little late.
I have a 509 Frame race bike and have used both 509 and 510 engines in it.All mounts are the same.

Bill Davis            Texas Vintage Racing Club
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