Yamaha 250MX air box, rear brake, frame mods

  Рет қаралды 1,663

Dale Sweger

Dale Sweger

3 ай бұрын

In this video I finish the frame mods, and the air box build, then work on the rear brake setup.

Пікірлер: 74
@jamesws3
@jamesws3 3 ай бұрын
You are totally on a fabrication roll, Dale! What a fascinating study in DIY, determination and creativity. Very much looking forward to seeing this one run!
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Hey Jim, yes this is true fun, the more I get into it the more fun (and more headaches) there are. It is moving right along.
@retromechanicalengineer
@retromechanicalengineer 3 ай бұрын
You're a talented fellow Dale. It's really taking shape now. The look of the bike reminds me of the Cheney Yamahas of the 70s. Best wishes, Dean.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks Dean, you are right, I haven't thought of the Cheney Yamaha's in years, they were true racing bikes, they did have longer suspension, but not this long.
@engranger
@engranger 3 ай бұрын
As always fun to watch the work in the shop. I'm continually impressed with the variety of skills you have, truly a "jack of all trades". For me the best part of the project is that it isn't just a restore, it's a custom. The old bike looks so cool with the longer travel suspension. The final product will be gnarely. 🙂
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks man, it's just fun to see what you can come up with. If it handles at all, your right, gnarly it will be.
@davidleland8729
@davidleland8729 3 ай бұрын
😂It's coming along nicely Dale! Liked what you did with the air box. Looking forward to watching you build the exhaust pipe. The 185 is now a roller and the modification to the TM pipe to fit the 185 is done.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Wow David, sounds like your making great progress, not sure I have the same outlook on building the pipe. New to me and challenging, I'm sure. I am just sure it will not be a one-episode job!
@petermckee1061
@petermckee1061 3 ай бұрын
Coming along wonderfully Dale! It's looking great. And I love blue😄 Cheers, Peter.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks Peter, yep got to love the blue hose, the manufacture didn't offer options......just blue.
@eotruba
@eotruba 3 ай бұрын
I would have been tempted to cheese out and use all-thread on that brake rod. Great work.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
No, you wouldn't Evan, you would have made it right. Thanks buddy.
@sidecarbod1441
@sidecarbod1441 3 ай бұрын
Some air boxes have a pipe sticking out of the bottom with a one way valve (reed valve) type of thing, the idea is that if water gets in it will run out of the pipe but the engine cannot suck air up the pipe, it might be worth looking at rigging something up like this especially as the air feed to the carb is at the bottom of the airbox. Anyway, good work, an interesting video! EDIT, in fact I guess it does not matter too much if the engine does suck air up the pipe, it will still have to go through the filter, if the end of the pipe is submerged in water the engine won't suck water up because it won't be able to create enough vacuum to do that as the top of the air box is open, so I guess just a pipe sticking out of the bottom of the air box would work without any valve. You could make the pipe exit the bottom of the airbox at the lowest point when the bike is on its side stand (kick stand).
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Yes, I had one of those one-way valves on my RM, and the RM and PE boxes I have, had them, but they are since rotted away and no longer available. I may look into some later models, could be you can still get them from the manufacture. Not really worried about getting water up that far at my age, I go around obstacles like that. Understand the need for the youth though, I know when I was younger, I drowned a lot of bikes. Thanks for the comments, I do like to know what others think and their solutions. Part of the fun. Thanks man!
@jamessharp9790
@jamessharp9790 3 ай бұрын
Really appreciate your videos , Dale. Your candor about mistakes and corrections especially. I’m sure the pipe will be great also. Sorry I haven’t kept up lately , got pneumonia beating me down past month plus. Look forward to seeing progress on this DT and later the C2 Rm. Contact if you need help finding C2 parts etc . Take care, James
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Hey James, wow hope you are feeling better and healing up. That crap can really get you down. Take care of yourself, summers coming, time to get the bikes out.
@cainbeeping8480
@cainbeeping8480 3 ай бұрын
Great job on the fabrication.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks again buddy
@frankdillon6127
@frankdillon6127 3 ай бұрын
love the Fab videos, good food for the brain!
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
I agree, lots of fun, even when you have to redo it.
@markaddy53
@markaddy53 3 ай бұрын
another great job dale looks good another job ticked off the list next video please
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks Mark, yep knocking down a few of the small jobs.
@cainbeeping8480
@cainbeeping8480 3 ай бұрын
Looks great brother
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks Cain, nice to see ya here.
@tomdell7169
@tomdell7169 3 ай бұрын
Thanks Dale
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Your welcome Tom, thanks for stopping by.
@donbridgewater2988
@donbridgewater2988 3 ай бұрын
Hey Dale, it's been awhile. Checking in to see what's up today in the shop.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Hey Don, always something happing around here.
@davidnelson6893
@davidnelson6893 2 ай бұрын
Yes you are a pro Peace out
@mikeflohr4043
@mikeflohr4043 3 ай бұрын
Nice fabrication skills...adapt and solve...and on to the next situation cause it's ALWAYS something 👏😎👌 I'm jus say'n, Flodaddy ❤
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
You are so right Mike......Always something!!!
@wilsonocasio8370
@wilsonocasio8370 3 ай бұрын
Hi Dale, the bike is going so well. You can convert the MX250 rr brake arm into a 1982 YZ250 and forward style. Verify pictures of that arm, I think that it can resolve the rr brake...
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks Wilson, man I wished I had seen this before today, that would have made the job easier for sure, I was able to make it fit in the original place and work properly. But if it doesn't work out that is exactly what I will do. Thanks again for the suggestion.
@customgaragemoto7590
@customgaragemoto7590 3 ай бұрын
Top video 👍👍👍👍👌
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thank you!
@DarrenNoonan-to8ut
@DarrenNoonan-to8ut 3 ай бұрын
Cool calm and no bull shit can l move into next door ,Dale awesome!.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Hey Darren, sure appreciate the kind words my friend. I have a lot of folks wanting to move next door and hang out in the shop with me. It would be a hoot for sure to have a bunch of guys that think the same, bench racing and talking about mods to dirt bikes. Your right.....Dang Awesome!!!
@user-vi6et1qj9z
@user-vi6et1qj9z 3 ай бұрын
😉😉😉😉thank's again....
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks for stopping by Dale, this project keeps getting better.
@RDEnduro
@RDEnduro 3 ай бұрын
That airbox is trick its definitly going to work. I made silicon intakes as well and had them 90 up. but I couldnt use them but they seemed to cover the little hole on the outer lip on the Tekie carbs. Luckily i found reproduction yamaha. On cars though that silicon works well
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
I haven't had much experience with the Teikei carburetors, but the RD125 engine I have did have them, not real familiar with them and jets seem to be hard to find, I change it over to Mikuni. Much better source of jetting for them.
@chrisbenn8691
@chrisbenn8691 2 ай бұрын
Hey Dale, when you weld on the tabs do you feel as though you bring out your inner Japanese man assembly worker? Nice relatable content. Is how i sometimes do stuff. My project is a '79 DT175 with some later model parts. From Sydney Australia 🇦🇺, enjoying the channel.
@montana2strokeracer
@montana2strokeracer 2 ай бұрын
Thanks Chris, yes, I do sometimes feel that way. It's really just trying things and if they don't work try something else. Lots of the mods I've done here end up getting in the way. You just have to do it over and hope for the best. It is a fun project and seems a lot of other folks are enjoying this series. Thanks for hanging out in the shop with me.
@cainbeeping8480
@cainbeeping8480 3 ай бұрын
Had my chain break on me on my way to Harbor freight today. It sucks to push it back to the house.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Holy cow dude, how far a push was it. Your right though anytime you push it sucks.
@cainbeeping8480
@cainbeeping8480 3 ай бұрын
@@montana2strokeracer half a mile
@VSR7684
@VSR7684 2 ай бұрын
You might find another brake plate with a cable anchor on it that fits that hub if you need one.
@montana2strokeracer
@montana2strokeracer 2 ай бұрын
I was able to use a rod hook up, so no need. If I had thought out this project more, I would have used a Suzuki wheel on the back as I did on the front. But those 78 to 80 RM wheels are tuff to find. You will see it in the next episode of this project. Thanks for spending time in the shop with me.
@VSR7684
@VSR7684 2 ай бұрын
@@montana2strokeracer 77-79 PE hubs are the same and theres various brake plates that can be used with them from other TS/DR/SP's etc. But if you got it sorted now OK
@dralexmclean
@dralexmclean 3 ай бұрын
Dale: Are you using a different disc to cut off aluminum. Mine always seem much happier cutting steel than aluminum. Once again, great video. I invariably learn watching you work, inspiring. Alex
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Hey Alex, no its the same I use for ferrous, doesn't work all that great but got the job done, usually cut aluminum with a saw, but couldn't in this case. Did load up a bit, but as soon as I cut steel again its free and clear.
@dralexmclean
@dralexmclean 3 ай бұрын
ah well, I'd hoped you'd found the secret disc! Have a great day. alex@@montana2strokeracer
@montana2strokeracer
@montana2strokeracer 2 ай бұрын
Nope.....no secret disc, just getter done anyway possible.
@frankdillon6127
@frankdillon6127 3 ай бұрын
made it,frank here.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Never a worry my friend!
@bigmurr725
@bigmurr725 3 ай бұрын
Hey Dale , thanks for the Great video . When you were gluing the weather striping on the air box it looked like you were using the old 3m "Gorilla Snot " was it ? As far as the pipe I imagine you have a small slip roller ? Warmest regards Dale . Murr
@jeffdavison8421
@jeffdavison8421 3 ай бұрын
Great headway Dale. Shortening the brake lever arm shouldn't pose any issue's with operation of rear brake. Your right on point with the necessary mods to make it function. Keep the video coming. Jeff Davison. Saginaw, Mi.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thanks Jeff, it's always encouraging to know others agree with your direction. I am hopeful this will work; I will get it set and pull the shocks again and see how the motion is.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Hey Murr, you are correct "gorilla snot" it is; however the original stuff was that terrible yellow color. Glad they did give you options. LOL Yes sir have a slip roller. Do you recommend Tig welding or gas. Seen it done both ways, the ones I made years ago I brazed.
@bigmurr725
@bigmurr725 3 ай бұрын
@@montana2strokeracer hey Dave, I always use oxyacetylene never braise the torch you were using it look like a Smith air crafter, but it’s been a while as long as you have a super small tip. Personally, I would make the cones out of 20 gauge, which I believe is 035 wall and I think 18 gauge is .049
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Thats what I was thinking, I have a Victor setup and a pretty small tip. 20 gauge material is what I have. I am thinking you don't use much filler rod, just melt the two together and hammer.
@luismelero6198
@luismelero6198 3 ай бұрын
Good morning from Spain. First .
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Welcome Luis from Spain, how did you slip in here so early. Its late here in Montana USA, probably caught all the guys and gals sleeping over here. LOL
@luismelero6198
@luismelero6198 3 ай бұрын
@@montana2strokeracer I Love your work. Thanks for sharing.
@luismelero6198
@luismelero6198 3 ай бұрын
I was having breakfast...
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Right on brother. Thanks for following the channel, I sure appreciate it.
@Gareth04100
@Gareth04100 3 ай бұрын
Hi Dale. I apologise for a blatant request for your knowledge. My Yamaha CT1. Am I correct it runs a simple half bridge rectifier and that using a multimeter I should only see the average charge voltage. Ie. 3.0-4.5 volts depending on revs? Or do I have a generator issue? It's a 1969 model.
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Yes, they do use a rectifier to convert AC voltage made at the charging coil to DC to charge the battery. I usually just check the voltage at the battery, should be about 7.5 volts at 2500 rpm. Must run a battery on these bikes to absorb any voltage spikes to prevent the bulbs from blowing.
@MakinEndsMeet69
@MakinEndsMeet69 3 ай бұрын
Yeah Dale I appreciate that information I was kind of thinking the same thing even if I had those carbs welded in and then rethreaded them I would still just be threading into aluminum. That seems to be the whole problem the aluminum right. Hey buddy thanks again I appreciate the feedback can't wait until your next video
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Yes, sir the helicoils are stronger than the filled in and retapped aluminum, easier too.
@MakinEndsMeet69
@MakinEndsMeet69 3 ай бұрын
Hi Dale, What a fine bit of fabricating you been doing. Helping all that you've done works out for the best of what you wanted. I have a question for you asking for your help, on my 82 GSG 650 Suzuki my vacuum carburetors two of the screws for the top caps are stripped and they just happened to hold the mounting brackets for my throttle in that case what would you do to fix those aluminum carburetors? I am losing a little bit of vacuum due to this problem which is causing my bike not to run right on those cylinders. I would appreciate any help you can send my way. Dale such a great video I cannot wait to hear the old gal run again!
@montana2strokeracer
@montana2strokeracer 3 ай бұрын
Hey there, thank you very much, it sure is fun playing around with these old bikes. I think if it were me on those carbs, I would repair them with helicoils, it has been a while since I looked at those vacuum carbs, but they are probably either 5- or 6-mm screws. The helicoils would be better than new repair, much better than the aluminum threads.
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