125H runs for 5 minutes then dies

[magoo]

It's a Yamaha. Accept it and move on.

[DJRacing]

I would say that someone has over compensated on the pilot jet because it was running rich on the needle so they have put a very small pilot jet in.

Funny that Magoo, it sounds like he is moving on and getting some laps in.

[BONEHEAD]

yep its to rich , its up there with the 250 on the needle, i recommend going standard then working from there, try these guyshttp://www.mikunioz.com/ they will help if you know the jet size , read the site first so that you have a better understanding  of what jets you require unreal its running  .  CHEERS BONEHEAD

[YZ250H]

Remember I never said it was pretty.  No action shots yet (the missus was busy with the kids).
Comes complete with leg burner exhaust, "el flippo" rear guard and super shorty (broken) levers.  Also note FMX style front guard  'cause we all now how good these old girls are for FMX  .  The body is as I bought it.  Fugly but functional.
At least it goes well now and with a bit more fiddling should be spot on.   As normal for a 125 it spends most of its time on the pipe anyway.  Should give me reliable service for a while - "new" clutch, transmission, crank seals etc etc etc.  just needs a tidy up and some new plastics and all good  .

.

Will post video as soon as I can.

THE END !!!!!!!!!!!!!!!!!!!!!!!!! 
 

[DJRacing]

250H that looks like a '84 YZ125L pipe so the standard jetting may not be quite right. Probably more midrange orientated.

[yzhilly]

Hey Tony the pipe thats on your bike in my shed will fit it's got YZ125J on it  and it's in good nick

[YZ250H]

DJ,

That would explain why the pipe doesn't fit very well and has a mounting bracket in the middle of nowhere.  Seems to work Ok - mind you I have nothing to compare with.  I think I will go with it for now and see what eBay brings about.  I'll keep my eyes open.

Hilly,
I reckon that bike in your shed is complete enough for me to leave it in one piece.  By what you tell me and the photos you have sent it should just be a matter of getting her going again and giving it a once over.
The "L" pipe is in good nick too.  No dings at all.  Wonder if anyone would want to swap a good L pipe for a good H/J pipe?

[DJRacing]

Why not put a DG pipe on? I use one and the bike runs great with it. They are sold by Dirtoverstock on ebay(us).

[YZ250H]

Good point DJ.  I will definitely keep that in mind.  I haven't really done too much research on the 125 yet (apart from how to get one going  ),  the 250 has been the priority (and is again now that I have something to ride).  The 250 is going to be scmick  .
The way my riding is so far I don't think the pipe will be the limiting factor    so I'll run with the one I've got at the moment.  Once I get the 250 finished I will have a decision to make about which one to hit next - 125H, 125H/J or 80H.  Still a bit of work to do on the H/J to get her past the scrutineers.  I'll need to do a bit more research on that to find out what is required.  Mostly things like sprocket cover and levers etc.  I can probably do that at the same time as working on the 250.
I'll have a look at dirt overstock and save them in my favourites for future reference.  Thanks for the heads up.

[211kawasaki]

 :'(
Guys

98 posts on a YZ that only goes for 5 minutes, whats the story here? Sheezzz!!!

[Hoony]

well it is a Yamaha !

[090]

Yammie riders have plenty of time to chat about them 'cause you can only ride them for about 5 minutes!