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  #11  
Old 09-10-2010, 10:45 PM
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When done, spray the ignition components with WD40 or
MTTL and wipe off the excess. It's a good idea to clean, dry and coat the
ignition components after every ride. I leave the ignition cover off over night
to insure everything is dry. The stock plastic cover is next to worthless
when it comes to moisture.




should this be done if you dont have a plastic cover i installed a metal boyesen cover on my cr250
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  #12  
Old 09-11-2010, 09:40 AM
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Quote:
any chance you want to rebuild a yz250f motor?
Too many moving parts.
Quote:
should this be done if you dont have a plastic cover i installed a metal boyesen cover on my cr250
Good move, I use and recommend the alloy covers as well. They do
a good job of sealing up the ignition cavity, but it still doesn't hurt to
make the ignition cleaning/drying/coating a part of your post moto
maintenance.

dogger
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  #13  
Old 09-11-2010, 10:49 AM
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It was worth a try.

Looking forward to the next dogger-build installment.
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  #14  
Old 09-12-2010, 12:44 AM
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Thanks Dogger i'll keep it looked after maintance always comes 1st
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  #15  
Old 06-13-2012, 03:56 AM
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Thanks Dogger

That was indeed the problem. In the meanwhile i sold the bike, bought it back from the same guy, rebuild the whole bike. Only thing i didn't do was replace the crank. Guess what broke! Seized big end. lol. I have disassembled the motor and had the old bearing pressed out by honda here in the UAE. they pressed the new ones in. Bob's your uncle.

Only one small problem. How do i remove the 2 small needle roller bearings on the clutch lifter lever. Do i need a blind bearing puller for this or will the come out quite easily. Ibought all the bearing for the sub assemble. ALL of 'em. So i do not want to leave anything old in there. It will make all my efforts seem sloppy if i leave those older bearings in there. Honda told me that it will be a mission to get themout, they have to basically break them apart to remove them. i cannot think that this wouldbe the case.

There must be an easier way.


Good job BTW.......
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  #16  
Old 06-13-2012, 06:53 AM
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Quote:
How do i remove the 2 small needle roller bearings on the clutch lifter lever
Honda told you right, those two are a PITB to remove. I've never had
consistent success removing them by heating the cases so one of the
reliable methods is a blind bearing puller. The problem there is they
are bunched together and it's hard to get a good grip with the tool.

Another method is to cut the cages with a Dremel and a carbide bit,
collapse them and remove. This has very obvious drawbacks if you
slip or go too far.

I know you don't want to leave old bearings in the engine, but you
might want to carefully look at and listen to those two as you rotate
the clutch actuator by hand. If you don't feel any drag or hear any
thing, I recommend you leave them. They are not what you would call
high wear items to start with.

Good luck with the build, sounds like you're becoming an old pro at it
already.

dogger
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  #17  
Old 06-13-2012, 06:49 PM
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X2
leave em in. They are good for 20 years of hard use...........
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  #18  
Old 07-16-2012, 04:29 AM
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readme Thanks for the help Dogegr and Sean

Thanx Dogger and Sean. I think i will leave them as is. I replaced the lifter lever. I will pack it with good quality grease and hope for the best. As you guys said, it's not a high wear item that's got drag on it all the time. So we should be fine.

Not gonna spend more money fixing stuff that isn't really necessary. My wife is already p'ed off as it is.

Thank for all your efforts and helping us with issues like theses. lol.

Check out the rebuild on my fb. Gerald Vorster | Facebook

See ya soon.
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  #19  
Old 07-17-2012, 09:29 AM
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Sounds good D. You gotta choose your "battles" between the
wife and the dirt bikes. Just remember, happy wife, happy
home.

dogger
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  #20  
Old 07-25-2012, 11:05 PM
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@ Dogger

Wife didn't kill me yet. I started the "Black Hole" up last night. after the complete top and bottome end rebuild. 3 Kicks. Pretty amazing. I was chuffed!

Needless to say after the rebuild i still have some engine noise. Is this normal??? I have replaced all the bearings, impeller, crank, the works.

I had a look at about 5 different youtube videos and the motors on there sound pretty similar to mine.

Your advise would be appreciated.

Last edited by HorribleD; 07-25-2012 at 11:14 PM.
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