Author Topic: New Stable mate - IT425G  (Read 5688 times)

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Offline Tony H

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Re: New Stable mate - IT425G
« Reply #40 on: March 13, 2014, 05:28:45 PM »
Thanks Harko, I rubbed the old paint back, masked then painted the motor in frame. I do plan a full resto in the future, however must have a bit of fun first.

Offline 2fITy.J

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Re: New Stable mate - IT425G
« Reply #41 on: March 13, 2014, 05:34:54 PM »
however must have a bit of fun first.


That reminds me...must paint my IT250J frame!



...only been 5 years... ::)
A bike in the bush is worth two in the shed!

BMW-BSA-Ducati-Honda-Kawasaki-Lambretta-Matchless-Norton-Suzuki-Triumph-Vespa-Yamaha.

Dirty Dozen '13 DR650SE - '90 DR650RS - '82 IT465J - '82 IT250J - '80 GT80G - '77 A100B - '76 DT100C - '76 TC125 - '75 TM75 - '73 MX80 -       '73 TC100K - '69 TC120-1

Offline Tony H

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Re: New Stable mate - IT425G
« Reply #42 on: May 03, 2016, 12:53:26 PM »
The old girl has seen more than a few vinduro's and one long race. Compression has taken a dive, so new rings are due. The bottom end has no play and the piston is within spec. It's on .5 os and I bought some rings from the US for AUS$53 including freight-happy about that. I'll source a new base gasket,head gasket, hone the barrel and should get another couple of years of good service.

I need to investigate a sleeve or the possibility of nikasil as .75 and larger pistons are like rocking horse sh_t. I have NOS standard and .25 piston kits. Fortunately there still about.



Online Martin I Henry

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Re: New Stable mate - IT425G
« Reply #43 on: May 04, 2016, 05:19:21 AM »
There is a 0.75mm oversize size piston on UK eBay.

http://www.ebay.co.uk/itm/yamaha-IT-425-piston-3rd-oversize-3R8-11637-00-new-/172186154382?hash=item281718358e:g:uPYAAOSwv9hW4Ctb



If you want it, check the details, bid on it and get shipped to me or I'll pick it up from the seller for you.


EDIT:

This listing has piston and rings :

http://www.ebay.co.uk/itm/yamaha-IT-425-piston-and-rings-3rd-oversize-3R8-11637-00-new-/172186134198?hash=item281717e6b6:g:YrwAAOSwxp9W4Hd6

Cheers,

Dave R.

Offline Tony H

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Re: New Stable mate - IT425G
« Reply #44 on: May 05, 2016, 09:04:44 AM »


Response from Electrosil-

Hi Tony,

Unfortunately we are unable to coat onto a cast iron liner when it is installed in an alloy cylinder shell.

 

Cheers,

Electrosil Team

Fortunately there are other options.

 

Offline fred99999au

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Re: New Stable mate - IT425G
« Reply #45 on: May 06, 2016, 03:52:32 PM »
I've been told by Lozza on OzVMX that either Millenium in the US or NZ Cylinders in inzid can do a revised process to get nicasil to stick to a cast iron liner.

Apparently, they can plate up to .6mm thickness as well which if applied across the diameter would be nearly 5 oversizes depending on starting point.

Dunno about heat and the effects of it though.