DT125R ARCHIVE

ToySoldier · DTR Legend

RE: Yamaha WR250F USD Conversion Using an Extension

Calum122 · Guru

Lol 200+

DT-R_bradders · Guru

aww dude lovin the new pics looks sexy as ****, bet u cant wait to take it out for a burn

Calum122 · Guru

Yeah man. Looks much better now the front end is built up!

Me! What bout you. Yours is going to looker as sick as this. You haven't seen it all in person. Our builds are so similar. Is so strange though cause we didn't have any discussion about it it's just I I'm having 2007 rs wheels. I the y shape me too :)

But uhh yes mate. Absolutely itching. But too busy with work ATM. Which is good. My dad is effing and blinding about the spacer he's got to make for the rear wheel lmao! You know the fact it needs to support the rs brake lmao!

DT-R_bradders · Guru

i know man gonna be epic!

u fitting the rs rear caliper aswell? tht will be a right mission lol

Calum122 · Guru

Nah no problem at all

Going to make the spacer take the brake calliper. Will save myself a lot of problems that way.

DT-R_bradders · Guru

what wheel spacer n bracket as one piece?

Calum122 · Guru

Yeah

Calum122 · Guru

Use billet

DT-R_bradders · Guru

badman u gonna draw it up for ur engineer or give him the bike to do himself, itll prob cost a fair bit for a one off like that m8y

DT-R_bradders · Guru

dnt spose u know if ur dude uses cad cam, so its designed on the pc then transfered straight to the mill n it pretty much programmes its self. ?

Calum122 · Guru

It's my dad. No he won't. He'll draw a diagram (I imagine) and then borrow someone's lathe or similar and make it by hand.

Or I might not be sure. He'll think of something. I haven't got a clue but I'm learning a lot from watching him.

Unfortunately I don't live with him neither do I speak to him much. So I just have to wait and see lmao!

DT-R_bradders · Guru

ah rite fair nuff, itlle have to be made on a mill m8 no way be able to do it on a manual lathe, or cnc lathe, will take a couple of hours to programme it n machine it, thts if it goes smooth the first time round chances are itlle be a few attemps to iron out the errors n tht

Calum122 · Guru

Depends on how you do it. There's always more than one way of doing these things.

Hes more worried about this. What you think

He says we're goin to need to line up the front wheel with the back wheel whilst lining up the sprockets!

What you think. I can't imagine the rs hub being the same width as the DT hub. So how'd you get around that?

DT-R_bradders · Guru

prob could do it on a cnc lathe but the amount of material ur use would be way more than urll need, the lathe itself would need a massive chuck.n itll be one crazy ****ed up program to do it. could even make it a 2 piece welded together, turn a nornal spacer then weld on a hanging plate to hold the caliper.

n tht did cross my mind bout the sprocket position but im not too worried, im gonna get the wheels lined up center to the swing arm n mod the carrier if i have to, could posssibly shim up behind the front sprocket to help straighten it up. but itll be easy to turn back the carrier a few mm. but only prob then might be the chain gettin too close to the tyre. i wouldnt worrie m8 the chain will have a bit of sidwards give in it, could always make a guide out of nylon block either side of the front sprocket as peace of mind. in case the chain does wanna bail lol

Calum122 · Guru

It's not just the chain you need to worry about. A angled chain will have adverse affects on the sprockets and the Cush drive. Costing £££. In the Long run its a job worth doing properly.

FunkeyMunkeyDavid · Guru

offset sprockets would be the way to go i reckon,like these

images?q=tbn:ANd9GcRsMB_HqPQxlhd-snvkZ2pQ_9yUQYI03fr-QfWTZxjkRSw1wjbG

Calum122 · Guru

VERY good input.

But unlikely to get best results no?

I mean the offset is going to need to be exact otherwise what's the point I might as well machine it. Also I'm going to need the right size and teeth

FunkeyMunkeyDavid · Guru

very true lol they do come in different offsets,but then i'm not even sure rd sprockets would fit a dt? its the idea i wanted to suggest more than anything though biggrin

great fun modding,solve one problem and create two more....

Calum122 · Guru

The other option would be to move the engine lmao

FunkeyMunkeyDavid · Guru

lol thats where i'm at with my yz frame. but then the weight will be offset wont it? confuse hmm it'll look lush when you've finished,but you'll be dribbling in the nuthouse lol

Calum122 · Guru

Yeah. Depends. If its on a few mm it won't make much difference. Since the engine isn't exactly perfect distributed anyway. Plus you could weight it down.

It won't be any different than what NORFE did when he shaved the magneto

DT-R_bradders · Guru

dave where did you find thos thtll be the best best, but i would of thought a 28mm offest is way more than we'll need would have to mod the plastic casing if we wer to run thos as it would be right up against it lol

Calum122 · Guru

Yeah. I'll see what my engineer reckons. He wouldnt let me ride a bike that wasnt 100% safe!

FunkeyMunkeyDavid · Guru

here's the link http://www.google.co.uk/imgres?imgurl=http://www.twostrokeshop.com/AFAM_offset_sprocket_28mm.jpg&imgrefurl=http://www.twostrokeshop.com/28mm_offset_sprockets.htm&h=233&w=498&sz=50&tbnid=L6kWhW45qwT9EM:&tbnh=57&tbnw=122&prev=/search%3Fq%3Doffset%2Bsprockets%26tbm%3Disch%26tbo%3Du&zoom=1&q=offset+sprockets&usg=__WXBatCaeOiWK90p3wUhfb6TASB4=&docid=-Yvkgtz0BHDEjM&hl=en&sa=X&ei=tvWfUIiIEMzMtAa2r4H4CQ&ved=0CC8Q9QEwAg&dur=6799

think they were for rd specials and race bikes with engines they shouldn't have in them biggrin

Calum122 · Guru

Nice.

It looks like it's worked out all ok weirdly enough. All I've had to do was space the rear sprocket out using spacers. This seems to have put the sprockets inline.

I've actually been knocked back a bit with this project. Annoyingly it seems as though the bottom bearingso n the yokes are not the right size. Which means I have to strip the whole thing back down again. Hopefully It will just mean a new bearing being pressed onto the yokes. I'll keep it all documented here. Will make things easier when I or when whomever has the bike after me needs to do maintenance.

I've test ridden the bike and it's excellent. Handles lovely and pulls really well with the sprocket setup. Slight issues with dodgey wiring causing me to have a closed non working YPVS. Quick fix. Haven't fully tested the bike but the rear brake is sound although having real issues bleeding the front brake. Air bubbles are infinite and on going so I'd say there's an air leak somewhere.

Feels like I'm never going to get this bike going. But at least I got to ride it. Weather is still shocking so no real hurry.

Things left to do is sort out a new bracket for the vapor. Sort out a new alarm system and hidden away. New plastics all round. I bought a new tank for the bike but was very disapointed with it. More dings in it than I expected. And I don't like the colour. So I'm going to have it resprayed black.

Thanks to Ralzy I got myself a brand new OEM Seat for it. Very chuffed with it so thanks again matey.

For those who think this project has stopped I update it regularly but I want everything on one page and in a logical order. So unfortunately It's all on the first page. Got lots left to do with this project and I am actually taking a break away from it to focus on other projects. I look to get it running for the summer and then start again in the autumn.

Calum122 · Guru

Right. It's finally finished.

I'm aware this has taken me a while but that's cause I had no idea what I was doing lol.

Right so I've sorted out the play. It's basically where the bearing wasn't sitting in the race properly.

So I've just pressed the bearing off. Put a spacer behind it of 2mm and then pressed the bearing back onto the stem.

No more play!