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Old 04-28-2020, 01:05 PM   #3286
anytwowilldo
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Join Date: May 2012
Location: Sonoma County
Motorcycles: XR-400 (plated), KTM 525 (Plated), KTM 990 Adventure, Husky TE300, R1150RT
Name: Tom
I ordered a Wrench Rabbit complete engine rebuild kit for the RM. She has been good to me. It's time to return the favor.
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Old 05-06-2020, 05:31 PM   #3287
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I sent my cylinder to Millennium Technologies to be recoated.
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Old 05-06-2020, 06:56 PM   #3288
OaklandF4i
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Join Date: Feb 2002
Location: San Francisco and Lake County
Motorcycles: Triumph Street Triple, YZ250, TLR200, XR400R, Husqvarna FE350, TE300, a vintage CR390, Honda ST1100
Name: CJ
Quote:
Originally Posted by anytwowilldo View Post
I ordered a Wrench Rabbit complete engine rebuild kit for the RM. She has been good to me. It's time to return the favor.
No piston, head, or cylinder pictures? How are we going to debate your jetting, hours, or ring and air filter maintenance schedule if we don't have pics? I don't know about anybody else, but I feel cheated!

I finally got around to tearing down the XR forks Yesterday from Baja and ordered new OEM bushings and seal kit. Need to stop being lazy and start knocking off projects.... like I don't lack them.
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I'm looking for 1970 or older Triumph 650 project, cheap and preferably complete. PM me if you have something - will provide it a good home.

If you think me being naked is offensive, dont look!

"You find the biggest meanest bull, chop off his balls, dangle them in front of him, then hop on his back. That should give you some reference point. Either that, or shove a shuttle rocket up your ass. Take your pick." Colin Edwards

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Old 05-07-2020, 03:40 AM   #3289
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Location: Crockett
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Originally Posted by anytwowilldo View Post
I sent my cylinder to Millennium Technologies to be recoated.
Rm250? Sonoma?
Did you get that bike from Andy??
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Old 05-07-2020, 10:01 AM   #3290
2strokeYardSale
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Join Date: Mar 2007
Location: Northern Nevada
Motorcycles: shouldn't have cams!
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Quote:
Originally Posted by anytwowilldo View Post
I sent my cylinder to Millennium Technologies to be recoated.
My cylinder went to PowerSeal yesterday by way of Thumper Racing, who is rebuilding my crank.





Today I sent my Scotts damper off for a rebuild and tried to source engine bearings locally.



Two of the transmission bearings were bad, the 6004 (open, output shaft right) and 6004RUD (single sealed, input shaft left). Must have been the WalMart oil!

I've been doing so much I'm not going to hijack this thread. I might start a "complete YZ250 rebuild" thread.
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Last edited by 2strokeYardSale; 05-07-2020 at 10:06 AM..
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Old 05-08-2020, 02:04 PM   #3291
thedub
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Quote:
Originally Posted by 2strokeYardSale View Post
I've been doing so much I'm not going to hijack this thread. I might start a "complete YZ250 rebuild" thread.
This thread had 15 posts in the month of April... I don't think you need to worry about hijacking a relatively inactive mega-thread.
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Old 05-08-2020, 08:07 PM   #3292
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Join Date: Feb 2002
Location: San Francisco and Lake County
Motorcycles: Triumph Street Triple, YZ250, TLR200, XR400R, Husqvarna FE350, TE300, a vintage CR390, Honda ST1100
Name: CJ
Inspired by TwoStrokeYardSale I tore down my spare YZ250 motor in preparation for swapping out 3rd-5th WR450F gears I've had sitting in the workshop for over a year and make a parts list. Will complete my YZ250 to YZ250X conversion.

As the crank and cylinder are near perfect, looks like I just need to order top end gaskets, piston kit, and main seals. Not often you open up a motor and need less than expecting or prepared for.

Also my hour meter's display seems to have gone wacky and no longer reads the hours. Will add a new one to the parts list I guess.
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I'm looking for 1970 or older Triumph 650 project, cheap and preferably complete. PM me if you have something - will provide it a good home.

If you think me being naked is offensive, dont look!

"You find the biggest meanest bull, chop off his balls, dangle them in front of him, then hop on his back. That should give you some reference point. Either that, or shove a shuttle rocket up your ass. Take your pick." Colin Edwards

'Cycles is a mean toy lady" Big Halsy
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Old 05-08-2020, 08:14 PM   #3293
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I just remembered to turn off the charger for the Alta.
Thanks dudes.
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Old 05-09-2020, 06:39 AM   #3294
2strokeYardSale
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Did you have any rust on your crank?

I read Motul 800 will cause rust, and I used it for the first couple years when I also tracked my TZ250.

It probably doesn't help that I let my bike sit all summer. Maybe I should pour some oil in the crankcase and push it in gear before storing it.

On the other hand, it was just cosmetic surface rust that didn't affect anything.
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Old 05-09-2020, 06:43 AM   #3295
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Quote:
I read Motul 800 will cause rust, and I used it for the first couple years when I also tracked my TZ250.
? Did you find this with your motors? I've run that for years, now mostly run the 710. Don't think I've had one of those motors apart to the crank to look for rust. Is it hydroscopic or something?
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Old 05-09-2020, 07:27 AM   #3296
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Name: CJ
Quote:
Originally Posted by 2strokeYardSale View Post
Did you have any rust on your crank?

I read Motul 800 will cause rust, and I used it for the first couple years when I also tracked my TZ250.

It probably doesn't help that I let my bike sit all summer. Maybe I should pour some oil in the crankcase and push it in gear before storing it.

On the other hand, it was just cosmetic surface rust that didn't affect anything.
No, zero rust and this motor is a spare that has been sitting for years. Never heard that about Motul. Can you elaborate about the why, interesting. I use inexpensive BelRay SL-2 semi-synthetic for its low flashpoint as I ride my bike like a 90 year old grandma.
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I'm looking for 1970 or older Triumph 650 project, cheap and preferably complete. PM me if you have something - will provide it a good home.

If you think me being naked is offensive, dont look!

"You find the biggest meanest bull, chop off his balls, dangle them in front of him, then hop on his back. That should give you some reference point. Either that, or shove a shuttle rocket up your ass. Take your pick." Colin Edwards

'Cycles is a mean toy lady" Big Halsy
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Old 05-10-2020, 08:47 AM   #3297
2strokeYardSale
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I, too, used Motul 800 then 710. I don't think anything else has ever been in my bike. If there was an oil that for sure stopped or lessened the spooge, I'd be all over it.

The rust was just something I read on the interwebs. I've also read some really stupid shit, like this last night while researching taller gearing:

Quote:
change around your gear ratios and you could pump out some more power. But doing so remember that your bike is only meant to have 5 gears and if you supe it up to make it run like it has 6 gears you might have to re-jet.
As far as the gearing, I think I'm going to do 5th gear only. $70ish for the gears and $20ish for the circlips. JFC, Yamaha, can we get affordable Tusk or Pro-X circlips or something?
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Old 05-10-2020, 09:13 AM   #3298
MotoJP46
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I replaced the clutch cable on my CR250R with one from MotionPro which I found was much better than stock. There is an additional protective sleeve which I really liked too.
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Old 05-11-2020, 10:04 PM   #3299
OaklandF4i
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Join Date: Feb 2002
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Name: CJ
Swapped out 3rd, 4th, 5th gears in my YZ250 transmission with WR450F wheels and pinions. Will now have the same wider and taller transmission gearing as the offroad specific YZ250X in my YZ250.

No more winding out in 5th gear as fourstrokes take off in the open.

Need to order a new piston and some main seals, then this motor will be ready to go.
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I'm looking for 1970 or older Triumph 650 project, cheap and preferably complete. PM me if you have something - will provide it a good home.

If you think me being naked is offensive, dont look!

"You find the biggest meanest bull, chop off his balls, dangle them in front of him, then hop on his back. That should give you some reference point. Either that, or shove a shuttle rocket up your ass. Take your pick." Colin Edwards

'Cycles is a mean toy lady" Big Halsy
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Old 05-12-2020, 07:12 AM   #3300
2strokeYardSale
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Join Date: Mar 2007
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Originally Posted by OaklandF4i View Post
Swapped out 3rd, 4th, 5th gears in my YZ250 transmission with WR450F wheels and pinions. Will now have the same wider and taller transmission gearing as the offroad specific YZ250X in my YZ250.

No more winding out in 5th gear as fourstrokes take off in the open.

Need to order a new piston and some main seals, then this motor will be ready to go.
I ordered 5th only for my 13/51. What final sprockets do you run?
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