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Marketplace => Wanted => Topic started by: Yamahaha on May 31, 2013, 09:55:38 am

Title: 1979 YZ400 Conrod
Post by: Yamahaha on May 31, 2013, 09:55:38 am
Hi guys i am in desperate need of a conrod for my 79 Yz400f, any leads or help would be greatly appreciated as i need it back together in 3 weeks for upcoming VCM and Viper events. Cheers Mark
Title: Re: 1979 YZ400 Conrod
Post by: Cabmkr on May 31, 2013, 12:00:56 pm
Mark,
      I used an 83-89 YZ250 rod in my 78 IT400, you can use the folowing link to reference for size. I have been using wiesco rod kits in all my rebuilds. 79 400 might be the same as a 90-98 (same as and 80 81 YZ250?) but I am not sure


http://www.mitaka.co.uk/ROD%20DATABASE/PAGEPage4.html (http://www.mitaka.co.uk/ROD%20DATABASE/PAGEPage4.html)

Cheers
Title: Re: 1979 YZ400 Conrod
Post by: TT5 Matt on May 31, 2013, 01:17:27 pm
nice pages with all the rod specs on them.ive finally worked out how jens put a 250 piston in a ts185 ;D
Title: Re: 1979 YZ400 Conrod
Post by: bigk on May 31, 2013, 04:42:52 pm
Think I have a stuffed crank here, might have a good rod on it, I'll have a look.
K
Title: Re: 1979 YZ400 Conrod
Post by: Rookie#1 on May 31, 2013, 04:49:52 pm
A fine lookin young rooster like yourself you'd think there'd be plenty of people offering to slip you a rod! :D
Title: Re: 1979 YZ400 Conrod
Post by: Yamahaha on May 31, 2013, 05:41:09 pm
Remind me not to camp near you at Harrow Brendan, you've got me worried now  ;D
Title: Re: 1979 YZ400 Conrod
Post by: TT5 Matt on May 31, 2013, 05:41:46 pm
that's abit anal but will take the haha off of his forum name :o ;D
Title: Re: 1979 YZ400 Conrod
Post by: Rookie#1 on May 31, 2013, 05:52:11 pm
Yes, if I camp next to him at Harrow he might have to change his forum name to "Yamaouchouch"  :D ;)
Title: Re: 1979 YZ400 Conrod
Post by: Rookie#1 on May 31, 2013, 05:59:21 pm
Also worth noting that it's part# 2X5-11651-10-00  and is also used in IT400F and IT425G
Title: Re: 1979 YZ400 Conrod
Post by: OverTheHill on May 31, 2013, 07:02:10 pm
"79 yz400 was the odd one out with a smaller bore [82mm] & longer stroke which doesn't necessarily mean a different length rod [i think!!] but just thought i'd mention it. Here's a thought now, Big Bore the "79 400 using an earlier [or later] YZ400 piston. Pretty sure i compared them a lifetime ago & looked the same just 85mm instead of 82mm. Someone may have done it?. Like i said, the "79 was the odd one out [but a good one] Had one brand new back in the day. Isn't it a bummer we sell one bike to get the money to go towards the next year model [talking back then] & regret not keeping it 34 years later!!, along with all the others, ohh--triumph metisse etc, depressed now, where's me beer.
Title: Re: 1979 YZ400 Conrod
Post by: Maicoman on May 31, 2013, 09:57:34 pm
The IT400F and IT425G share the same rod as a YZ400F, same part#, try looking for these with IT in your part search.
Title: Re: 1979 YZ400 Conrod
Post by: TT5 Matt on May 31, 2013, 10:43:10 pm
search it40079 rod and theres a buy it now crank with a good rod on it $39 plus post
Title: Re: 1979 YZ400 Conrod
Post by: bigk on June 01, 2013, 10:46:56 am
Found the crank (ignition side web is rooted), rod feels good. I'll press it apart & let you know. You can buy a pin, bearing & washers easy enough, might get you out of trouble.
K
Title: Re: 1979 YZ400 Conrod
Post by: Yamahaha on June 01, 2013, 01:31:14 pm
Ok mick thanks for that please let me know
Title: Re: 1979 YZ400 Conrod
Post by: facthunt on June 01, 2013, 06:01:47 pm
Try YZ/IT 465/490 rod kit. Dimensions look good.http://www.mitaka.co.uk/YAMAHA%20RODS/CT.YZ490.htm (http://www.mitaka.co.uk/YAMAHA%20RODS/CT.YZ490.htm)

Maico 490? http://www.mitaka.co.uk/OTHER%20RODS/CT.MAICOB.htm (http://www.mitaka.co.uk/OTHER%20RODS/CT.MAICOB.htm)  Crankpin is 3mm longer.

Another supplier. http://www.con-rod.com.tw/bearing-connecting-rod/RO-8201.html (http://www.con-rod.com.tw/bearing-connecting-rod/RO-8201.html)
Title: Re: 1979 YZ400 Conrod
Post by: Yamahaha on June 05, 2013, 09:25:33 pm
Bit of a follow up: after many calls and emails help was not far from hand in the ever resourceful Brent Kerr (motomaniac) not only did he know what parts to use he had them: thus crank is sitting in my shed complete with new rod kit pin and bearings. Cheers also to Glen at GTS engineering for doing it so quickly. Bring on VCM/Viper!!