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Messages - 1983_Enduro_YAMI

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Wanted / Re: 1984 YZ490 Frame
« on: February 22, 2019, 10:36:06 PM »
When i got the frame for my IT250K it was pretty rusty however once it's sand blasted it was mainly surface rust with only little pin holes which i got away with some good quality fibreglass filler....Definitely one thing to keep in mind but these days frames are hard to come by so i sort of take the first one that comes..and of course with plenty of photos beforehand. For the YZ490 frame, i would rather be focusing at the brackets/supports of the frame..these frames are well known to have either bent or broken brackets and often it leads to the crack on the frame tubes. It's one of the main reason why i want to replace mine since it came with a lot of defects when i purchased it. 

Wanted / 1984 YZ490 Frame
« on: February 21, 2019, 07:39:26 PM »
Hi all,

I'm after a 1984 YZ490 frame in reasonable condition. A bit of rust and scuffs should be fine. Please let me know.


Tech Talk / Wiring loom re-wrapping?
« on: November 30, 2018, 06:57:49 PM »
G'day all,

I've recently purchased an Aus spec wiring loom for my was looking a bit dodgy so i decided to replace all terminals and tidy up the wires by unwrapping it it's all sorted and i'm ready to wrap it back up together...don't really wanna use electrical tape as they go gooey and comes off over time. What other options are you guys using apart from the electrical tape?

Tech Talk / Re: Jumping on 2nd gear??
« on: October 29, 2018, 10:46:38 PM »
It seems to make sense for the dodgy dogs...i will just have to take it apart again for further inspection and keep you guys updated...thanks for everyone's help much appreciate it  :D

Tech Talk / Jumping on 2nd gear??
« on: October 27, 2018, 07:53:33 PM »
G'day all,

I'm having a problem on my 84 XT600 motor that i just rebuilt...1st, 3rd, 4th and 5h shifts and pulls smoothly however this 2nd gear frustrates me due to it's jumping in and out of it and making some growling noise...All the parts that i have replaced are brand new NOS bits with double checking prior to each installation......I don't understand why it's doing this  :( :( ?? Can anyone point me out the right way out of this please?

Tech Talk / Yamaha shift stopper lever trouble
« on: October 07, 2018, 08:05:41 PM »
G'day all,

I'm having a bit of trouble to try to put my gear shifting stopper assembly back on the bike...for some reason it doesn't free spin like it should be..i have all the parts installed in the right order however the bolt is holding up the entire assembly so it won't be able to move up and down..anyone have any ideas?


Tech Talk / Re: Crank bearing housing resleeving?
« on: September 11, 2018, 04:24:17 PM »
Yeah i have contacted the machinist today about getting it's better to sort it out then leaving's just gonna get worse before it gets better hahaha

Tech Talk / Re: Crank bearing housing resleeving?
« on: September 10, 2018, 07:57:45 AM »
hijack!! havent got a good shock for an it 490 L???

Hahahahahah!!! nah sorry mate i haven't got one as i haven't bought one just yet  :D :D :D

Tech Talk / Re: Crank bearing housing resleeving?
« on: September 09, 2018, 11:28:02 PM »
Yeah looks like i have been brainwashed by the yammies a bit too much and my old man have been riding Yamahas for our whole life...the old man had a XT500 in which a very little maintenance was conducted back then but never had a problem with it at i've got a collection of IT250K, YZ250J, YZ490L, KX125 (it popped up one day and swapped it with a set of car ramps lol) and the most recent one is this XT...i really enjoy riding it until i discover this issue but i'm just gonna look into it a bit more since it's registered  :-\ 

Tech Talk / Re: Crank bearing housing resleeving?
« on: September 09, 2018, 09:19:25 PM »
Even though i'm able to find a new set of cases it's just gonna happen repeatedly  :( :( Maybe i should of waited a bit longer for a 500 :( Thought these 600 would go just as good but it's way below from my i just have to speak to the machinist about it for a best solution of this... 

Tech Talk / Re: Crank bearing housing resleeving?
« on: September 09, 2018, 05:58:09 PM »
Speedy sleeve any use. Confused me reading numbers but think i came up with 3.146 [79.9084 mm] ID on the nearest size i could find on page 26. Your 6307 should be 80mm OD, so 'what's that'--too tight on the bearing to fit. Think i read they're 11 thou thick so no doubt ya bearing's not that loose in the case. good old DT1 & all related early motors have a steel piece cast in with the case, never a problem--till later motors like , oh, my yz125e or f--e i think where they started casting the case around a separate 'alloy' ring which then came loose in the case!!. Wasn't obviously visible unless you looked closely or had got caught out as some did. case was cast right up over the front edge of the ring so had to look in a couple of mm or more to see where the ring started, & with the bearing in place you could--click click click the complete thing. Not sure what the theory was but was a pain when it went wrong. Even had an RM250X "81 where 'that alloy ring' same set up--had broken into bits, so bugger it, sold it in bits to someone clever with machine shop gear.

I had a look at's mainly design for the shaft that's worn out?

Tech Talk / Re: Crank bearing housing resleeving?
« on: September 09, 2018, 05:57:06 PM »
I've sleeved plenty of different make and models using steel sleeves. Pins are not necessary if you get the correct interference and use loctite retaining compound. Once fitted with sleeves it is important not to heat the cases when fitting bearing as the heat will damage the loctite bond.

so basically just heat up the cases, drop all the bearings in and leave the crank bearings at last and install it with loctite once it cools down right? I was told by a couple of people that loctite might break up when the engine is at normal temperature due to the case is aluminum and bearing is hardened steel?

Tech Talk / Re: Yamaha clutch actuator arm bearing removal?
« on: September 09, 2018, 05:51:07 PM »
I have tried the blind bearing puller today...not much of luck from it because it hasn't got any lips for the puller to catch on...more or less just slips out as soon as i start to hammer it.  :(

Tech Talk / Re: Crank bearing housing resleeving?
« on: September 05, 2018, 07:41:25 PM »
Thanks mate...yeah it's not sloppy nor out of round however the bearing can be installed into the housing easily in normal temp and i can spin the bearing with my fingers in the seat so might as well while i have to apart i will do it properly that way i won't have to worry about it permanently. These early XT600s are bulletproof motor..will do 120,000kms from the showroom floor but this is the only problem. I am a bit doubtful about the using loctite for this time because the bearing is hardened steel and the case is aluminium..once it expands the loctite may not be strong enough to hold on and break up.

Tech Talk / Crank bearing housing resleeving?
« on: September 05, 2018, 06:36:23 PM »
G'day all,

On my '84 Xt600 the crank bearing housings are worn out...bearings could free spin and be taken out while the case is cold. :( I'm thinking about resleeving the case by enlarging the housing, make a 2-3mm sleeve then press it in with dowel pins so it won't spin in the housing. Has anyone done the similar thing before because of the worn out crank bearing housing?

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