2003 CR85R .. i got an adjustment problem . i hope, please help

[stephend]

I got a 2003 cr85r , the bike only starts if its bump-started down a hill which means kick starting dsnt make enough spark to start it , could it be my CDI box ??, the other thing is , is when i bump-start it the choke has to be up to start, even if it just started and the engine is warm and i go to bump start it again. for some odd reasion i need the choke up , but As its running i can put down the choke and it seems like its running fine when im riding , but i cant let it even idle or else it dies out , to be honest i think its starving for feul , but i have no idea where , help me out on this . this is what makes me want a 4 stroke

but help me out on this if you can .

 

[CRazy250]

kick starting has nothing to do with spark, its definatly all carb related probably or just worn rings.

 

[stephend]

yeah , any rec. in which brand rings i should get or just look for OEM rings . but if its not the rings , could it be anything else

 

[griffbones]

Do yourself a favor and do a compression test as this will tell you if there is anything wrong with the top end before you go spending money. If you don't have a compression tester, go to Walmart, you can buy a tester for less than $25. They are probably not the best testers, but they will work ok.

 

[CRazy250]

just go with wiseco or oem if its still on the stock piston and bore.

 

[Patman]

How do you know the spark is weak? There's a few areas that could cause a weak spark, coil, CDI, stator or even as simple as plug or plug boot.

It sounds to me like you need a top end which may mean more than just rings.

A factory service manual would make all of this A LOT easier for you. While not a glamorous as a pipe or gold chain they typically are much more useful.

If you think a CR85 is giving you fits you want nothing to do with a 4 stroke! There are A LOT more items that can cause you a lot more grief and the maintenance is typically SIGNIFICANTLY more involved that a 2 stroke.

 

[stephend]

Yeah i hope its not my top thats gone i mean , it runns when being push started which obv isnt good and means u have a problem but i guess it still can be the top end , im gonna run the compression test to see what happens . idont think its anything electrical... but i do have the Factory service manual . so what should i look up to make this shyt easier , and yeah once this 85 runs im selling it and getting a 4 stroke , i hate changing plugs unless ppl know where i can get plugs by the bulck for cheap bec 7 bucks a pop for an NGK plug puts a dent in my wallet

but still if u think its anything else becides either a new ring or a top let me knoww!!!!

 

[mideastrider]

If you're going through plugs like that you may need a top end thats alot of plugs. No need to spend 7 bucks a plug either get you a BR8ES for about 2.50. But check the compression to make sure. A top end job is not that bad either you can get OEM from honda a piston, ring, head gasket 75.00 or less. Let us know how it turns out.

 

[Patman]

Does your manual have a trouble shooting guide in it? If it's a factory Honda manual it does. That will give you th best answer to your problem since you are on the scene. From all the indications I am getting through your posts yes you are very likely looking at needing a top end job. This could be as simple as rings or you may need to hone the cylinder and go with an oversized piston & ring set. Either way it's way easier than trying to solve a 4 stroke with similar starting/running issues. See you would then have valve adjustment to throw in the mix which is a necessary evil. Of course all those extra parts need to come off and go back on when your four stroke needs a top end, yes it too will need rings and possibly a piston replacement to run after "X" hours just like your current bike.

Do yourself a huge favor and do a lot of research before you buy something that obviously isn't going to get the level of preventative maintenance it will need. A 2 stroke is much more forgiving of less than optimal maintenace proceedures and is less expensive to fix when something does go wrong.

I'm not a premix fanatic as I ride a modified XR and have a fleet of 4 stroke pit bikes. Go to a site like Bikebandit.com and look at some of the engine schematics for a 2T and then similar class 4T and you'll get an idea of what kind of potential mess you might get in to. Also don't assume a 4T is going to last longer as that is not the case with the current high stress race engines fitted to the current 4T race bikes.

 

[stephend]

yeahh we'll i have a friend who like strippes his banshie apart just for the hell of it, and hes has the compression tester and he'll basicly know wtf he is doing i mean i have a little background of knolage about this but , i thoght it coulda been the top end but its starts if its push startes so i thought it wouldnt but , obv im wrong.... but if i did use BR8ES's thats not too hott of a plug for me . i thought anything that ends with an es usualy is for a 125 bec it needs a hotter plug. but yeah i am going through plugs and its a bitch to pay to much , i know how 4 strokes can have their valve prob which is hard to do the timing and all that , but would there be wear on the p[iston or what would the piston look like if i needed a new one ..

 

[mideastrider]

Yeah get the compression checked and see what it is. Never know you might get lucky. If you do have to tear it down just clean and inspect the piston verywell. I would go ahead and replace the piston but if you're low on cash it could be reused if it looks good. A new Honda piston will be around 32 bucks.

 

[Patman]

Go back to posting in english, the short hand crap will run off any good help you might hope to get.

Yes a 4T will need rings and pistons just like a 2T so you won't be getting away with anything.

 

[150rguy]

What 4t are you planning on gettin?

 

[stephend]

kx250f ...

but i found out the problem.. i took out my piston and a (potty mouth) .. idono how but it coulda been from my spark plug idono what did this but a shard of metal like no bigger then the tip of a spark plug fell into the cylinder head so the top of my cylinder has holes and dents in it and so does the my cylinder head (on the inside of it) .. so im deff buying a new piston, top end gaskets , and unfortionitly a new cyclinder head... anyone who knows a good place to buy a new cylinder head let me know

 

[mideastrider]

Need know for sure where that "shard of metal" came from before you put it back together. Theres a good chance its from the bearing cage from the big end rod bearing. If so there will be more shard's to follow.

 

[Patman]

Make sure it can't be easily cleaned up first. Considering that it may not have gotten the best maintenance to this point anyway a few nicks in the head might not be a big issue.