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 Post subject: 1974 MT250 Build:
PostPosted: Fri Feb 25, 2011 11:51 pm 
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Just a heads up to all you purists out there... this is in NO WAY a restoration. This is a modernization of the 1974 Elsinore. I bought the bike two years ago with a busted case and bend shifter shaft. Luckily, when I purchased the bike, it came with 2 new cases and an entire (goosed out) extra motor.

Here's what I got:
Purple hack job.
Spraypaint all over everything.
Goosed front forks (leaking).
Flat tires.
Busted motor.
Spare cases.
HOOKER expansion pipe.
No side stand.
No side cover.
Hopes and dreams...
2-stroke awesomeness...
-$150 bucks.

Here's my intentions:

PAINT SCHEME:
Black: Fenders, tank, motor, hubs, airbox.
Red: Frame, fork tubes, swingarm, stripe in tank.
Gold: Triples, brake pedal, sprocket.
Original/Chrome/Aluminum: Spokes, rims, bash-plate, levers, and handlebars.

BODY MODIFICATIONS:
2006 YZ250 Yamaha front fender. (Black)
2002 RM250 Suzuki rear fender. (Black)
Fork boots/gaiters. (Black)
Chop the loop of the rear of the frame, add mounting tabs to support fender.
Keep stock airbox (woods bike).
Keep stock inner-fender.
Update tires for mud/sand.
Update grips and controls if needed.

--------------

THE STARTING POINT:

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As you can see... this will be fun.

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Sat Feb 26, 2011 12:14 am 
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When I first got the bike home, I tore into it like a mad-man. I was so excited to start working on a new project that I ripped the motor out, and had it in pieces within a day. Unfortunately, this was also the time I had just bought a new bike for the street (an 01' Triumph Tiger 955i) and it had taken most of the summer's worth of attention I had.

So a couple years later, I look in my garage and, sure enough... no "Honda Gnomes" came and did the work for me... So, I manned up and said... "That's it... I'm getting this done." Within a months time I went from parts on the bench, to something that resembles a completed motor...

I first started with that PESKY bent shifter shaft... As you can see here.

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I originally didn't notice the shaft until I placed the new case over it, when I couldn't shift... I knew there was an issue. So, off came the case, out came the shaft, in went 100% BRAND NEW bearings in the ENTIRE motor... and 100% BRAND NEW seals everywhere. (Kick shaft, shift shaft, crank shaft... everywhere.)

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Then I was able to bolt the entire motor back together using Grade 8 M6 Allan head bolts... rather than trying to use the stock phillips-head machine screws. By the way... this would be a good time to mention that ANYONE doing any sort of motor repair to a bike with phillips-head machine bolts should invest in an Impact Screwdriver. Best invention in the world.

The transmission looked in amazing shape too... no wear on anything.

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Anyhoo... after re-assembly, a quick compression test (142psi), and a dry-run through the gears (all 5 are MINT) I decided to give her a good coat of high-heat gloss black paint. She came out stunning.

Before:
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After:
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So, with the motor in good order... getting spark, good compression, new gaskets, seals, and bearings... my attention moves on to the other parts of the bike... there's a lot. Damn it.

Took the front end off, rebuilt the forks with new seals, stuck some new 10w oil in the forks (a tad too much unfortunately) and now they're stiff as boards... after a quick suck with my brake-fluid syringe and a re-measure, they're good to go. Unfortunately, I am NOT keeping that deep red color... I am going with the Honda "sunrise" red color. much brighter and a good throw-back to the 80's MX bikes.

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A quick mock-up of the boots and fender... and she's looking quite good!

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The seat-pan was in HORRIBLE shape... I could literally fold it in half. After some quick welds, and gorilla-gluing the rest rubbers in-place, I was able to give it a shot of black paint, re-fit the foam, and give it a new seat cover... looking mighty nice.

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The front spokes were in aweful shape as well. Someone had painted the whole front wheel silver (grrrrr) with a spraycan and it did not look good at all. After stripping the spokes down to bare metal there wasn't a whole lot left to them. Luckilly, China makes them for cheap... Lol. I found a set for 40 bucks on e-bay brand new. They worked out well.

Before:
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After:
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As you can see, I took the time to paint the hub black and the speedo-ring gold. Starting to look really nice. Some Aircraft Stripper took the silver paint off the rim leaving the chrome untouched. Why on earth would you spraypaint silver over chrome? Some people.

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Sat Feb 26, 2011 12:21 am 
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Next... I started in on that purple gas tank.. the bane of my existence.

Before:

Image

Aircraft stripper to the rescue:
(I actually DID see the original Orange stripe with Silver under about 5 coats of other paint... it went Purple/Gray/White/Yellow/Orange and Silver/blueish gray base coat/metal.) I actually did think about simply clear-coating the 'urban camo' look.

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Body filler and a light coat of primer revealed... I need more body filler and a LOT more sanding with 400 and 800:

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1st coat of red on top. The stripe pattern will be back-masked on top of this and the whole tank will be spray-bombed gloss black:

Image


More to come!

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Sat Feb 26, 2011 12:34 am 
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Back to the frame for now. I chopped off the loop (I know it bolts in, but I could not for the life of me slide it out of the clamps... I don't know why). I then too 2 bolts and capped the holes. Not pretty... but it does the job. I then fit my Suzuki RM250 rear fender into the hole and was able to weld two nuts to the base of the frame to mount directly into the stock Suzuki holes... The only other bit of mounting to do was to weld a small washer on the crossover plate to mount the middle of the fender and viola... done!

Quick snapshots of the run-down.

Capped frame ends. I had my welder feeding too fast and burning too slow... First time using a 110w home job w/flux wire... yuck.
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Center mount... much better weld. Lol.
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Nice and cozy!!! Fits like a glove!
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Nice hide-away mounting area.. no nut and bolt.. just one small bolt with a LOT of loctite.
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Close enough to perfect for me!
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Not only did it come out looking MUCH more modern... but the stock seat fits the lines on the Suzuki fender GORGEOUSLY. I do have a bit of fit and finish work to do on the fender... drilling holes and simply making it straight, but other than that this was a VERY easy modification. I did have to chop a good portion of the front of the fender off... but that's only because it ran into the stock mudguard.

The final product:

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OH... and those shiny things??? Those are NOS RedWing "Hammerhead" Shocks... not UBER modern, but they're period-correct performance shocks. That big reservoir is to help prevent shock fade and they're 100x better than stock... and about 1000x better than the "made in mexico" orange shocks that were on there to begin with.

A quick little comparison of the before and after...

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Finally getting some of the big work out of the way...

Next up... rear wheel... paint the frame... tires... Soooo close.

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Sat Feb 26, 2011 12:37 am 
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Before the frame, rear wheel, and tires....

I had to get a side cover... I found this heap on flea-bay for 5 bucks... God Bless America.

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So... I quickly busted out the Bondo Hair and went to town on it... Shot it with some primer... and viola!

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No tab, cracked up, piece of what's that... to a nice usable part :). Hooray!

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Sat Mar 05, 2011 12:53 am 
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The paint is almost done...

Couple more rounds of 1000 grit and then clear.

Image

Image

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Tue Mar 08, 2011 1:05 pm 
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Posts: 53
THE FRAME!!!! FINALLY!!!!

Image

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Slight mock-up.

SO glad I changed to the brighter red... looks more vintage 80's Elsinore.

I am aware I have the front wheel at the back.. just for looks for color.

I think it's looking great... little more paint to throw on the frame, then... who knows? Assembly?

Still have to:

Cut holes in side cover to mount
Paint side cover
Paint air box
Clear-coat tank
Disassemble rear wheel for paint
Clean carburetor

Then... it's all nuts and bolts.

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Sun Mar 13, 2011 11:15 pm 
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Headbearing in, exhaust springs, exhaust painted and installed... i just HAD TO TRY AND START IT...

AND SHE RUNS LIKE A CHAMP!!!!!

Now, all I need is the clutch cable, hand controls (new levers), brake cables, and the chain re-installed.

SO pumped. And she doesn't look half bad either.

One last little "fixie" issue, is the petcock leaks like crazy. New rubber gasket and valve gasket is on order.

Remember this???

BEFORE:

Image

How about now?

AFTER:
Image

Image

Just needs the stickers :). :D

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Mon Mar 14, 2011 12:10 pm 
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Joined: Fri Jul 14, 2006 8:12 am
Posts: 323
Location: Wuppertal/Germany
Danny955i wrote:
Just needs the stickers :). :D

and other fenders. the new style does not match to an old bike. :?

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80 CR250Ra
80 CR250Ra
78 CR250R
80 CR80
82 Bultaco Sherpa 340
78 Bultaco Pursang 250 MK12
76 Bultaco Frontera 370 MK10
76 Bultaco Alpina 250
73 Bultaco Lobito 125 MK6
76 Suzuki RM125A
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 Post subject: Re: 1974 MT250 Build:
PostPosted: Tue Mar 15, 2011 10:59 pm 
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Posts: 53
Wow... no one likes the choice of fenders... at all.

I've shown my friends... other bike guys... no one enjoys the modern fenders on the old bike.

I, personally, love it.

I think, maybe I'd do the CR250M swap... put a CR250M DG pipe on it, put side panels w/number plates from a CR on it, and then maybe go back to the loop rear w/stock fender.

As for the front... I dunno. I really hated the narrow fender w/rubber skirts. A lot.

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Wed Mar 23, 2011 11:41 pm 
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Ok... so here's the thing.

Oval number plates are out, for the sides... too much modification to the frame needed to mount them (CR250M plates are the only ones that would remotely fit).

However, I am planning on modding a stock OVAL front plate to receive a 'hidden' headlight.

Last but not least for this weekend:
-Petcock seal and knob gasket
-Rear brake cable.
-Final torque on all bolts.
-New levers.
-Exhaust flex-joint gasket.

Finally... re-visiting the rear fender. Possibly considering original w/red stripe.

May have to hack up the frame (again) to weld rear-loop back on.

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 Post subject: Re: 1974 MT250 Build:
PostPosted: Thu Feb 16, 2012 3:25 pm 
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Joined: Mon Feb 06, 2012 11:05 am
Posts: 6
Just dug up this older thread searching for "fenders" and wondered where you went with this after March.

Did you swap the fenders? I'd love to see a picture of your final product.

I'm working thru my '75 MT250 and have thought about including the red stripe from the tank on the front and rear fenders to continue the theme...I know it's not how it originally came but, in my mind and in all the older pictures of these, the fenders seem so bare! I'd do them in a similar, but to scale, manner with a taper on each end and include the black pinstripes to match. I think this would look great and kinda cafe'-ish...yeah, not too MX.

My wife has given me a hard time on this idea, as I have spent waaaaaaay to much time and $$$ hunting down pieces/parts under the blanket/disguise of bringing it totally back stock/original. (THAT would NOT be ORIGINAL, honey! :lol: )

What's the Forum's opinions on my fender stripes idea?


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