loose chain

[85 250sx]

Hi i have an 86 250r and the chain is a little loose i was wondering if you could tighten them or do you just take some links off thanks

and should i get a crankcase saver what do you guys think about them

[Dammit!]

Loosen the two allen keys at the back of the swingarm, then take a pry bar or large screwdriver, stick that into one of the adjuster grooves to the INSIDE of the rear sprocket (towards the swingarm) and push down until desired tension is achieved. Tighten allen keys. Done.

[85 250sx]

how tight should the chain be?

[a-camp]

About 1.5 or 2 inches of travel on top in middle .

[yamahaman89]

just be careful with a loose chain thats how i cut my left index off 4 months ago

[85 250sx]

just be careful with a loose chain thats how i cut my left index off 4 months ago

wow howd that happen?

[85 250sx]

what about the case savers?

[85 250sx]

Loosen the two allen keys at the back of the swingarm, then take a pry bar or large screwdriver, stick that into one of the adjuster grooves to the INSIDE of the rear sprocket (towards the swingarm) and push down until desired tension is achieved. Tighten allen keys. Done.

How much will this let me adjust it? because it has allot of play like 3-4 inches on both top and bottom

[deathman53]

get a case saver, it should be the first thing you get.

[Dammit!]

There's a pretty good range of adjustment. Just try it. It only takes a minute.

Case savers are a good idea too.

[yamahaman89]

well i went ot put the chain on because it fell behind the sproket and i lifted the chain towards the sprocket and it cought the chain and my finger too.it was hangin by skin and i had a 3 hour surgery and 3 and 1/2 monthe of therapy

[OldSchoolin86]

well i went ot put the chain on because it fell behind the sproket and i lifted the chain towards the sprocket and it cought the chain and my finger too.it was hangin by skin and i had a 3 hour surgery and 3 and 1/2 monthe of therapy
I don't think you can blame the chain on that one. OUCH!

[jeswinehart]

just be careful with a loose chain thats how i cut my left index off 4 months ago

i can relate to that ,,,, got pics ??? john


( case savers are cheap compared to engine cases )

[85 250sx]

ok i tightend the chain and i tightend it as much as i could and i ended up with about an inch of travel so hopefully it wont fall off any more i was wondering if the 86 250r's came with chain guides because mine dosnt have any and do they realy help?

[Dammit!]

Yes and, yes.

[TimSr]

ok i tightend the chain and i tightend it as much as i could and i ended up with about an inch of travel so hopefully it wont fall off any more i was wondering if the 86 250r's came with chain guides because mine dosnt have any and do they realy help?

Chain guides work great, as you rarely hear of a Yamaha throwing a chain. I dont know why Honda didnt use them, but they should have. They are not a subsitute for a good fitting, properly aligned and adjusted chain though.

[85 250sx]

are chain guides hard to come by or where can i find them?

[TimSr]

They have aftermarket ones, but the problem is to put one on right requires welding mounts to the swingarm, which is why you dont see them very often.

[jenndnn3]

Chain guides are still available. I had all mine replaced when I redid my swingarm. Plus I put Yamaha's idea on mine as well. One is a side view of it, the other, is the unfinshed swingarm but a good pict of the added guide. I had mine extended so I felt this was a great addition. The front of the swingarm you should be able to get the guides.

[85 250sx]

i found some after market guides at

http://www.rockymountainatv.com/Machine_Items.atv?cat=CH&type=GUIDE&make=HONDA&model=ATC+250R&year=1986&status=

whats the diffrence between the two? they look totally diff

[85 250sx]

can some one tell me whys these are differnt and where they go? thanks

[Dammit!]

The first one is just a stock replacement that goes over the swingarm (towards the front of it). The other... hell if I know. First time I've seen one like that. I was thinking it replaces the stock roller that's attached to the frame above and behind where the first one goes but I'm not sure.

[85 250sx]

do i realy need a chain guide? like will my chain be falling off all the time if i dont get one? or are they just nice to have for those few times it does fall off? how many of you guys have them or how many of you dont have them for thos who dont have them do you chains fall of often?