YZ250 Swingarm

[t9yl6h]

I have a 2005 YZ250 and the swingarm is pretty damaged and I’m wanting to replace it but can only find 2001 and 2002 models can anyone confirm which years (if any) will fit a 2005. Thanks in advance!

[crypto666]

I would just put stickers on it. 

[Drop-Bear]

JFYI, you can put an 09 YZF250 swing arm and linkage on the 2005 YZ250. That's what I'd be looking for anyway. I plan to run an 09 YZF250 swinger on my YZ build.

 

Edited September 12, 2020 by Drop-Bear

[CaptDan]

Any 2005 to current 2-stroke (or 2005 to 2008 4-stroke) swingarm will be a near-direct replacement. Try to get one with the chain guide, because those did change. Older swingarms may work, but the pivot bolt diameter was enlarged starting in 2002, and there were many linkage changes as well.

As @Drop-Bear mentioned, the 2009 & up 4-stroke swingarms will work, but may need linkage mix & match to get the correct suspension action.

It may be cheaper & quicker to just refurbish your current piece, as @crypto666 alluded.

Good luck, and keep us updated with what you do. ?

[Sullysully]

37 minutes ago, CaptDan said:

Any 2005 to current 2-stroke (or 2005 to 2008 4-stroke) swingarm will be a near-direct replacement. Try to get one with the chain guide, because those did change. Older swingarms may work, but the pivot bolt diameter was enlarged starting in 2002, and there were many linkage changes as well.

As @Drop-Bear mentioned, the 2009 & up 4-stroke swingarms will work, but may need linkage mix & match to get the correct suspension action.

It may be cheaper & quicker to just refurbish your current piece, as @crypto666 alluded.

Good luck, and keep us updated with what you do. ?

I believe for the pivot bolt diameter, the only thing that changed was the thickness of the bushing. Bearings were the same, and I know for 125s the sealing system changed. But technically you could just buy the correct bushings and it should work. Check parts fiche for confirmation.

[CaptDan]

^  ^  ^  Confirmed!

Good catch, @Sullysully .

I checked the parts lists (instead of relying on my memory  ) and indeed the pivot shaft diameter changed in 1998. 

Edited September 12, 2020 by CaptDan

[Captain.Olives]

On the 250 two strokes, the pivot shaft changed diameters (Larger) in 2002 and has stayed the same since.  
 

I think the OP would be fine with anything from 02 newer.   Some of the Fourstrokes ones will work as well.  
 

Pretty sure the early 250f swingarms share the same part number as their two stroke counter parts and I have a spare 02 250f swing arm.  
 

Wont be workshop until tomorrow, but can check if OP is interested.  On phone or I’d check part numbers on bikebandit.  

[FlatBrimJim]

The jack-wagon that owned my 05 must have been a real brain surgeon - because he somehow let the chain get floppy enough to saw thru the BOTTOM of the arm - then bought a new wear block to cover it up... ?

So I'm on the hunt for a new arm - and I think YZ Doc is gonna fix me up. He did mention that some people swap on the 250F arm - but I just want to go back to stock... although it looks like someone swapped an 06/07 arm onto my 05 at some point.

I ran thru the years at Partzilla - and this is what I found:

05           99999-03641-00

06-07     1C3-22100-50-00

08-20     1C3-22110-90-00

I figured they'd all the same from 05 to now since the Aluminum frame started in that year, but I guess they made some small changes.

Why do people swap on the 250F arm? Lighter? Linkage has better ratios?

 

Edited September 12, 2020 by FlatBrimJim

[EmpireofDerp]

14 minutes ago, FlatBrimJim said:

The jack-wagon that owned my 05 must have been a real brain surgeon - because he somehow let the chain get floppy enough to saw thru the BOTTOM of the arm - then bought a new wear block to cover it up... ?

So I'm on the hunt for a new arm - and I think YZ Doc is gonna fix me up. He did mention that some people swap on the 250F arm - but I just want to go back to stock... although it looks like someone swapped an 06/07 arm onto my 05 at some point.

I ran thru the years at Partzilla - and this is what I found:

05           99999-03641-00

06-07     1C3-22100-50-00

08-20     1C3-22110-90-00

I figured they'd all the same from 05 to now since the Aluminum frame started in that year, but I guess they made some small changes.

Why do people swap on the 250F arm? Lighter? Linkage has better ratios?

 

Yzdoc has a couple of swingers.

[YZDOC]

1 hour ago, FlatBrimJim said:

The jack-wagon that owned my 05 must have been a real brain surgeon - because he somehow let the chain get floppy enough to saw thru the BOTTOM of the arm - then bought a new wear block to cover it up... ?

So I'm on the hunt for a new arm - and I think YZ Doc is gonna fix me up. He did mention that some people swap on the 250F arm - but I just want to go back to stock... although it looks like someone swapped an 06/07 arm onto my 05 at some point.

I ran thru the years at Partzilla - and this is what I found:

05           99999-03641-00

06-07     1C3-22100-50-00

08-20     1C3-22110-90-00

I figured they'd all the same from 05 to now since the Aluminum frame started in that year, but I guess they made some small changes.

Why do people swap on the 250F arm? Lighter? Linkage has better ratios?

 

Daughter just came out last night, forgot to put it in the trunk.

She did bring my 2014 YZ250 main and sub frame.   

So, my other daughter (little brighter) brought it to her brothers house and they are removing the linkage attached (since you don’t need that) and will get it shipped straight to yah from SoCal.

But, we have not discussed the shipping address and such. It will/should be probably ready to go mid next week. ??
 

54 minutes ago, HeavyRotationClassic said:

Yzdoc has a couple of swingers.

Pipe down buttercup, that’s a secret. 

[FlatBrimJim]

1 hour ago, HeavyRotationClassic said:

Yzdoc has a couple of swingers.

Oh behave. Don’t you have some obscure literary reference to drop on some poor 19yr old who barely has a positive IQ?

[EmpireofDerp]

4 minutes ago, FlatBrimJim said:

Oh behave. Don’t you have some obscure literary reference to drop on some poor 19yr old who barely has a positive IQ?

Depends, what are her measurements.... ? never mind, she's 19!

[CaptDan]

2 hours ago, FlatBrimJim said:

...Why do people swap on the 250F arm? Lighter? Linkage has better ratios?

The '09 & up YZF swingarms use a larger diameter axle with unique hub and brake components that all add up to a noticeable reduction in weight. Though it is possible to use the carryover 2-stroke axle and stuff.

You need a certain combination of linkage bits to get it to work properly on the 2-strokes.

[FlatBrimJim]

47 minutes ago, CaptDan said:

The '09 & up YZF swingarms use a larger diameter axle with unique hub and brake components that all add up to a noticeable reduction in weight. Though it is possible to use the carryover 2-stroke axle and stuff.

You need a certain combination of linkage bits to get it to work properly on the 2-strokes.

Yeh I finally found the FAQ on the 09-13 250F arm swap. More involved than I wanna get with arm, linkage, hub & rim, brake, axle.

Plus my 56 yr old abilities *might* not be able to take advantage of the 2lb? Difference ?

[SmokinJoe]

I have an 09 yz450f arm n linkage with specific made. Slightly wider axle bolts that look OEM my friend machined. That allows you to use the stock yz250 rear wheel and axle setup. 

I sold my yz's recently so I'm not using it anymore. Hit me up if interested.

 

[Captain.Olives]

28 minutes ago, SmokinJoe said:

I have an 09 yz450f arm n linkage with specific made. Slightly wider axle bolts that look OEM my friend machined. That allows you to use the stock yz250 rear wheel and axle setup. 

I sold my yz's recently so I'm not using it anymore. Hit me up if interested.

 

Now that we got the OP's swing arm settled.... can we talk about those two stroke street bikes in your garage!  ? And any interest in adopting a 50 yr old "kid."  Lol

[SmokinJoe]

1 minute ago, Captain.Olives said:

Now that we got the OP's swing arm settled.... can we talk about those two stroke street bikes in your garage!  ? And any interest in adopting a 50 yr old "kid."  Lol

You mean my addiction. 1 '90 nsr250 1 '90 rgv250 1 92 tzr250 1 95 tzr250. And the lil ripper a 94 Yamaha tzm 150. All the 250's came from Japan. The tzm came from Thailand. It's based off the European tzr125rr. I believe i have the only one in the country. 

Unlike the 250's that were all used and needed total restorations. The 150 was an unsold leftover at some dealer in Bangkok. So it's a numbers matching and 94 was the first year. 

The 150 is incredibly light easily in the 270 - 280 wet full tank. 30 hp to the rear wheel i got it up to 100 mph. The 250's are around 320 to 330 wet. 60 hp to rear wheel stock gearing will top out at 125 - 130 mph. An absolute blast down a tight twisty road. 

These 250's were the street replicas of the GP bikes. In Japan huge racing class around them. S loads of OEM track day goodies available. Cdi's transmissions pipes cylinders etc. Could have you into the 70 hp range. 

The ones that are the closest to the actual track bike. Would be the Yamaha tzr250 3XV. The vtwin model that started in 91. Uses the same center cases and transmission clutch setup as the early 90's TZ250. Entirely possible to put tz top ends and such on it. 

Someone actually made a hybrid like that part tzr part tz as a street ride. Very fast but not really streetable. 

This pic is of the 95 tzr250 engine that I'm rebuilding. It's power valves are an earlier version of what Yamaha used in the 99+ yz250. 

 

[Captain.Olives]

What a collection!  This almost deserves a thread of its own.  I've gotten to ride a few two stroke street and track bikes over the years.   Ridden the RZ 350, Honda NS400R, Aprilia RS250, Honda NS125.... never owned one and always lusted after the opportunity to have even one of them.   Two strokes street bikes are rare in the US, but your collection is even rarer than most.   Good lord, nice job.   

Edited September 13, 2020 by Captain.Olives

[SmokinJoe]

3 minutes ago, Captain.Olives said:

What a collection!  This almost deserves a thread of its own.  I've gotten to ride a few two stroke street and track bikes over the years.   Ridden the RZ 350, Honda NS400R, Aprilia RS250, Honda NS125.... never owned one and always lusted after the opportunity to have even one of them.   Two strokes street bikes are rare in the US, but your collection is even rarer than most.   Good lord, nice job.   

My good riding friend has a few as well a 87 tzr250 a 85 rg250 a 90 kr1s and a 88 kr-1. With potential bikes in the making 89 tzr250 (reverse cylinder) and i have most of a 01 aprilia rs250 chassis. 

Pervious bikes that were sold 01 aprilia RS50 98 Honda nsr150sp and 85 rz500. 

A lot of these are now falling into the 25 year and older rule. Which means it's easier to import one and street title it. Unless you live in California then you're out of luck. California has in the past few years decided to enforce the 17 digit vin rule. 

In Japan they didn't use 17 digit vins they used frame serial numbers back then. Depending on the brand it was either a 9, 11 or 15 digit number with 11 being the most common. When registering it can cause scrutiny. 

If you can find one that has 17 digit vin number it's no guarantee in cali. Usually domestic market euro models have those and some of the limited Canadian models. Beware most of the ones in Canada are grey market imports too. It has to be an official home market for a 17 digit vin. 

There's also been a few of these guys "shops". That have been popping up lately buying bikes from Japan importing them. Dolling them up and flipping them for double for what they bought them for.

These punks are buying wholesale bikes at auctions. Then make them look nice and trying to pass them off as turn keys. When in fact it needs a total teardown before you even ride it. 

Unfortunately the guys in Japan have noticed this and since supplies are dwindling. Are now starting to ask high prices especially for a real nice one. 

[CaptDan]

Get a couple of those bikes out to the Rock Store, Joe. Lots of people there will recognize and appreciate what you have. ?

http://rock-store.com/