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DT125R Forum -> Projects -> Crf250 build project possible rebuild?
Post Info TOPIC: Crf250 build project possible rebuild?
Liam12


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Crf250 build project possible rebuild?
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Hi guys just went and picked up a project! Muhahaha it's an 07 crf250 twin pipe! At the minute the bikes stripped in bits! But I know it's all there as I took it apart originally, the engine has locked up not sure why haven't pulled it apart, I'm debating what to do with it do I take a chance and rebuild it or just build it back up as a rolling bike and sell it on! Not to sure what to do yet but here's a few pics it's one giant puzzle! 

Here's the bike before it was split 

here it is now 

 

 

 

How I got it home hahaha 



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Calum122


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Hhmm...it's missing the boost ports and expansion chamber??

It's not feasible to fix a 4T Crosser to sell it on for a profit. That's the kicker. Unless you fancy using it.

A full blow race engine is not going to be cheap to rebuild.

But it's a good place to start to learn about engines and what not :D

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Liam12


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I know mate I'll have to mod it ; ) haha

I know mate I'm not sure what to do yet I do have a good friend who owns Mitaka pistons who could possibly hook me up with a rebuild kit but it all depends on the damage

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Calum122


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It's more than just the pistons I was thinking about. If the valves are damaged then it's going to need extensive head rebuild. Stuff you need a specialist to do...expensive work.

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Liam12


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I know mate I'm just hoping a baring has seized or something stupid, praying it hasn't dropped a valve! I can see both exhaust valves are still in one piece and when I took the header pipe off nothing fell out which is good!

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FunkeyMunkeyDavid


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do the sums lol

if it costs more to repair than it's worth,strip it down to the smallest parts and fleabay the lot biggrin

either that or start mooching about for a cr 500 lump sprint.gif 



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Liam12


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Haha well I know even if I have to put £500 into im still spending more on parts than I paid for the whole bike! I wish I could afford a cr5 lump!

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Liam12


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Well I'm thinking the crank might have gone on the crf, checked the oil and filter today and well you can see what I mean by looking at the pics!

this is the oil 



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scrimsmustang


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FunkeyMunkeyDavid wrote:

do the sums lol

if it costs more to repair than it's worth,strip it down to the smallest parts and fleabay the lot biggrin

either that or start mooching about for a cr 500 lump sprint.gif 

 CR500 engine and the frame kit then everything else you need to do the conversion aint cheap either lol.............

Strip the motor and see whats up with it, if it aint dropped a valve shouldn't be to bad. But still salty money........



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FunkeyMunkeyDavid


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that oil reminds me of goldschlager...



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Liam12


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Exactly scrim! If I could I would but sadly can't afford it haha!

Oh and I know! I've never seen oil like this before! Haha the engine is getting stripped this weekend but building the bike back up as a roller

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scrimsmustang


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I guess that's one of those 10 previous owner MX bikes that was serviced after every race !

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scrimsmustang


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Put a Honda MTX125 engine in it and use it for Greenlaning lol !

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Liam12


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Haha I wish it was! Then I'd have a chance then haha! I serviced my bike after every race meeting cost me a fortune but had to be done

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Liam12


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Quick update, bikes now built up as a rolling chassis the engine is with a friend who has already confirmed the bottom end bearings have gone so I need a crank and conrod so that's it up to now! I've polished half of the frame up so looking quite I'll post some pics bellow!

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Liam12


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Frame built up so I can move it about

 

 

Looking better after a clean! 

many hours and sore fingers later! tooked up in bed with one side polished! 



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Liam12


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Well the engines split and the damage has been assessed, the crank bearing has failed causing it to destroy the bearing but has done minimal damage to the casings which is good, the engine is going to get rebuilt! Yayy another getting back out there! So should have some pics for you guys soon!

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Calum122


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Is it worth it? You will have to get the crank reground if the bearing has failed?

And it's not like it's a rare enough bike. Still think a 250 smoker conversion would be epic for this. Would cost around the same and get double the power....just saying.

Clean her up nice though Liam, be a wicked project :D

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Liam12


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It's worth it for me mate haha I know the guy who owns Mitaka so he's gonna sort me out with the parts. As much as I'd love to do a 250 smoker project it's just the welding that's the hard work!

Don't worry mate I will! She's tucked up away at the minute waiting for me to give her some attention!

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Calum122


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Welding isn't rocket science mate. You will only need the bare minimum of welding in order to make it work.

Nah that's fair enough mate. Good on you :D

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Liam12


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I know mate it's just the fact it's ally welding that's what worries me I've read up on it and seriously thought about it but I've seen some horror stories where it's all gone wrong! Maybe one day when I've got a bit more cash haha

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FunkeyMunkeyDavid


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i leave ally welding to the specialists lol 

saw pictures a few years back of what was left of an nsr 125..

bodged front wheel weld broke up at 80,it wasn't pretty hmm

put me right off trying it lol



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MIGHTYMAN


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Welding a wheel is completely different to a frame though!

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Liam12


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Yeah that's true who the hell welds a wheel! Haha

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Liam12


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im currently looking for an xr125 frame with logbook to transfer the numbers over to make it road legal haha



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scrimsmustang


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Why its only 55 quid to register it properly, just get a dating letter from Honda UK so you can get an age related plate. They will want you do put your request down in writing so fire them a letter off explaining you want to road register the bike, tell them the model and give them the frame and engine number and job done.......

Fire a letter off to

Honda (UK)
Customer Relations
Cain Road
Bracknell
Berkshire
RG12 1HL

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Calum122


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I think its more to do with he wants a 250 registered as a 125.

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Liam12


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Yeah exactly Callum, I'd love to have my full license and have it reged as a 250, but I can only ride a 125 so was going to get it done as an xr

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MIGHTYMAN


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That would be an interesting project!

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scrimsmustang


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Cant see the point when you can just send the new logbook back off to DVLA and change the cc on the logbook from 249 to 124, at least it would be legit and wont be a ringer with a dodgy XR frame number stamped on it.

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