big problem..

[riderssb250x]

so i have my motor at my local shop geting a new crk in it ints an 86 and apparently the transmission is all messed up alota gears are worn and a few bent shift forks whats the best way to go?

i heard of yukon gear sets how are those vs stock?

help me oput i needa tell the shop which way to go soon

[05LSR250R]

The Yukon gears are much better than stock!

[05LSR250R]

More info on the Yukon gear sets:
On the 86 trans, you will need to replace 5th & 6th on the main shaft as well! Because these are different ratio than 87-89!
Direct bolt on if your trans. is 87-89!

[Honda 250r 001]

DO the update. it works SO much better. i tried it and holy cow the 5th and 6th gears feel soo much more smoother. and yes get the yukon counter shaft gears, i have some shift forks if you would be interested.

[riderssb250x]

i want to but my mechanic is leaning me more towards oem he says there stronger and oem will always last longer and the fact ill have to be replacoing other gears isint fun

[05LSR250R]

Put the Yukons in!
OEM are weaker!
The trans is gonna be apart anyway.

[Swiper77]

Yukons are a no brainer if you can afford them plus you'll end up with better ratios. OEM will not last aslong and will not take the punishment that yukons do. Guaranteed!

[woodsracer144]

Originally posted by riderssb250x
i want to but my mechanic is leaning me more towards oem he says there stronger and oem will always last longer and the fact ill have to be replacoing other gears isint fun

im sorry but i have a feeling they guy your havin do the work doesnt know what hes talkin about... 1) why would yukon make gear kits and make them weeker then OEM.
2) its got the trans pulled anyways its already a mess..its just trying to get of getting his hands dirt and takin everything apart to change it over.

i know this is totally differant but its like sayin the OEM 250r shocks are better then Custom Axis or Elka or PEP...

[riderssb250x]

does this kit come with fst gear?

[05LSR250R]

2nd thru 6th.

[woodsracer144]

ktm has like a XC250 2stroke bike and a XC250W with a wide ratio gear... does honda have any thing like that? or would a wider ratio help you at all?

[Fear250r]

Who is doing your motor work?

[riderssb250x]

razee in north kingston you familiar with them?

its not that ythey dont want me to do the yukons
its just i have an 86 so ill only be doing yukons 2nd 3rd and 4th and illl have yto use 87-89 stock 5th and 6th will that make a diference since they wont be yukons?

im replacein the mainshaft with first gear all the forks im not messin around im rebuilding everything iots already geting a new crank and the whole 9

[All250R]

2nd and 3rd are the ones that take probably most of the abuse - 2nd gets nailed by false shifts to neutral and then slamming it in second before the shaft slows down. 3rd is next when someone is drag racing around... etc.

I don't know a lot about Yukon's. Someone who knows their metallurgic properties and can tell you exactly why they are better than OEM is the most trustworthy source to know what they buy you. If you're going to part with the cash to buy 5 Yukon CS gears and 2 OEM MS gears I'd want to have a solid reason for doing it. To put a yes/no, true/false label on what is "better" is going in a little blind to be frank.

If popular opinion is good enough, from what I've heard if you're running close to 60hp that's the time to think about abandoning Honda's original plans for the 250r transmission.

[riderssb250x]

im not sure on what I have for hp.. im on a stock cylonder .60 over rad valve boyseen reed stock carb full fmf exhaust..

as far as the gears the main reason im iffy about the yukons is I will only have 2nd through 4th in yukons then I need oem 6th and 7th which doesent seem to me like it makes sense will it make the whole trnsmission less reliable?

or maybe get the 2 oem and the main shaft and 1st gear cryoed to be close to durability as the yukons?

[riderssb250x]

another question I got is if I use the yukons do I need to change any spacers and stuff for the 86 or can I just go with everyrthing I was gona get regurely to rebuild the 86 or d I need to change anything?

help guyss

[riderssb250x]

bump... where's leigh? chime in=)

[riderssb250x]

bump need help..

[C-LEIGH RACING]

It is true that a 86 model gear made today are far better than the old model 86 gears from years ago. They are made a little stronger now than before.

Whats special about the Yukons, the open areas that are in the center of the OEM gears, where the shift dogs engauge into, thats filled in on the Yukons solid & it makes them a good deal stronger than the stockers.

It might could be, you may never build up your 250R so it will produce more power, which in that case you might not need the heavy made gears & the OEM ones would be ok. But, you never know when one will bust, do you want to take that chance.

I would say if you intend someday to up the power on the R, if you have those gears already installed you'll be way ahead of the game.

Even the 87/88/89 model gears can bust, they will just stand a bit more abuse than the older models.
Neil

[riderssb250x]

thanks neil, im planing on going with the yukons,
]
if i have an 86 do you off hand know if i need to change to 89 style spacers and collars and such? im rebuilding everything countershaft gears main gears all colars spacers bearing im not messsing around in the bottom end helphelp

[C-LEIGH RACING]

I cant answer that for you, never changed over an 86 model, only 87 & up.
Go to a site where has the parts finder micro ficshe & compaire the part numbers of each part you think might need changing, if any part is different that number will be different.

Best I can remember, dont remember changing any collars on the 87 & up transmission.
Neil

[riderssb250x]

alright i just found out what gears i need to update it i still need to find out about spacers collars etc i believe its all the sam i think the ratios only chsnged thats why the gears need to change can anyone confirm this or confirm exactly whats needed to update the 86 tranny?

[riderssb250x]

bump.. any collars spacers etc need to be used from the 87-89 for the update?

[thedeatons]

I do not have the answer to that question, but am hoping to provide insight on the rest of the situation.

If it were me and I was installing Yukons, and therefore was forced to still run a few OEM gears not included in the Yukon kit - I would certainly cryo treat any remaining OEM gears in the tranny.

No use mixing heavy duty and non-heavy duty when it comes to a tranny.

Guaranteed when the neighbor's nephew's kid gets on that thing to "take it down the road", one of the OEM gears will break, and you will find yourself wishing you cryo treated.

Not trying to scare you, it simply doesn't make sense to mix somewhat strong with super duty.

[riderssb250x]

well im all confused now I thought the yukons covered the gears that get hammered on the most will it be really bad to use yukons and just oem everything that's left?

still need info on spacers , collers and etc

[05LSR250R]

Nice job Deats........ya got the guy freakin out!
Get the Yukons and the 5th & 6th gear for the main shaft as stated before.

[thedeatons]

No, I didn't say that would be wrong, and am not trying to confuse you.

My personal opinion is that not upgrading EVERYTHING to the max would be a mistake. I am a very symmetrical person, so for me, being anal retentive, I would be sure to upgrade everything as much as possible, so you never have to go in there again.

That is just my personal opinion and what I plan to do when I do end up upgrading the tranny.

[thedeatons]

Why's it always me? LOLOL.....

[05LSR250R]

Its OK Deats......just razzin' ya' little bit! :D

I've come to realize that you are anal retentive LOL!

[riderssb250x]

alright so here's what I plan on
-yukon countershaft gears 2-6

-87-89 oem 5th-6th m/shaft gears

- new mainshaft with first gear

- all other gears oem that need to be replaced all 86 style im guessing?

- all new bearings seals

-new collars, spacers,washers etc.( anyone know if anyy of these need to be changed on the mainshaft or countershaft to 87-89 style?)

-new shift forks


anything else I should be replacing?

if I use all the other oem gears that aren't yolukon should I be alrigh im not planing on going any biger then a 295 maybe 310 in the future that's a bif if haha

anyone that's don't this that can help me out?

[05LSR250R]

Your collars and spacers and such shouldn't need replacing.
Looks like you have everything right as far as your list goes.
Everything else pertaining to other gears should be fine.

[riderssb250x]

alright sweet

well im going to order th yukons and 2 oem gears needed then go see my mechanic and have him order everything else besides what I have that needs replacing,

anyone know about how you know when you need to replace your clutch basket?

[riderssb250x]

well thanks to the help of duncan racing i finally figured out everything you need to update the 86 to the 89 with the yukon kit.
Yukon countershaft gears 2-6
oem 5th and sixth mainshaft gears 1987-89
87-89 mainshaft collar and spacer for 5th gear(does not come on the 86! 87 and up only!)

alot of people on here say all you need is the 2 oem gears you need the coller and spacer aswell

[Langbolt]

Here's a diagram.....Which collar and spacer are you reffering to ?

[opdmize]

This might be a little off topic but where are you guys buying your Yukon gear sets and for how much?

[Fear250r]

Ebay has sets. They're about $400.

[riderssb250x]

#15 and #20

they are shown in both the 86 and 87-89 diagram but only the 87-89 parts list shows a part num,ber

[thedeatons]

I have read in many places that a cryo treated set of new OEM gears is just as good as a Yukon set for MOST applications....

I would love to see more comparisons on this....

[86 Quad R]

all of my experiences with cryo treated gears have been good. ;)