Author Topic: RD350 Dirt Tracker  (Read 84783 times)

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Offline SON

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Re: RD350 Dirt Tracker
« Reply #150 on: March 21, 2014, 11:53:06 pm »
So Senior copied the Astro?
I have not heard this story!

Offline firko

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Re: RD350 Dirt Tracker
« Reply #151 on: March 22, 2014, 11:07:46 am »
Quote
  Bultaco Astro 1972, graphics and leathers design by Royal Sherbet and rider Mike Kidd to run AMA flattrack. Kenny Roberts 1975, Tz750 champion frame shadow block or strobe block graphics ( bumble bee)designed and painted by Mike Viss. The Bultaco and Yamaha designs share little in my opinion.
Who was first and who's telling porkies, looks pretty net though
With respect, the '72 Astro used standard Pursang graphics, I think the Sherbet/Kidd graphics came later on the the 74-79 Astro . Mike Viss may have painted the graphics on Kenny's Indy Mile TZ750 but the Yellow/bumble bee design had been in use long before that. 
                                                                 
                                                                 
                                                                         




'68 Yamaha DT1 enduro, '69 Yamaha 'DT1 from Hell' '69 DT1'Dunger from Hell, '69 Cheney Yamaha 360, 70 Maico 350 (2 off), '68 Hindall Ducati 250, Hindall RT2MX, Hindall YZ250a , Cycle Factory RT2MX flat tracker, Yamaha 1T250J, Maico 250 trials, '71, Boyd and Stellings TM400, Shell OW72,750 Yamaha

Offline yamaico

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Re: RD350 Dirt Tracker
« Reply #152 on: March 23, 2014, 08:46:53 pm »
Finished the baffle cones and mufflers and welded them all together. Just need to make the two mounting brackets and then start on the right hand side footrest and brake pedal.




Offline steve234

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Re: RD350 Dirt Tracker
« Reply #153 on: March 23, 2014, 09:22:32 pm »
Nice work!
Bultaco M106 Astro
Wanted: Dirt track bikes / parts / info

Offline yamaico

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Re: RD350 Dirt Tracker
« Reply #154 on: March 25, 2014, 05:34:39 pm »
Finished the right hand side footrest bracket and rear brake pedal. The bracket also has the mount for the rhs exhaust.





It's now ready to be pulled to bits for the powder coating, painting and zinc plating. While that's going on the fork dampers can be shortened and a lug welded on for the brake backing plate and the engine can be rebuilt.

Offline mick25

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Re: RD350 Dirt Tracker
« Reply #155 on: March 25, 2014, 07:48:25 pm »
looks good  8) you are doing a top job , I just finished a mates husky frame XR500 transplant  8) Lots of bits to make like you brake pedal foot peg brackets , tanks brackets  etc etc a big list of jobs but worth it in the end , I would two pack frame instead of powder coat
 

Offline yamaico

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Re: RD350 Dirt Tracker
« Reply #156 on: March 25, 2014, 11:28:44 pm »
looks good  8) you are doing a top job , I just finished a mates husky frame XR500 transplant  8) Lots of bits to make like you brake pedal foot peg brackets , tanks brackets  etc etc a big list of jobs but worth it in the end , I would two pack frame instead of powder coat

Yeah Mick, all those little brackets and bibs and bobs are what takes all the time, and there doesn't seem to be anything to show for the effort. I've just spent the last few hours making up the rear brake torque arm and mounting boss, including machining up a nyloil bush. Time cosuming, but has to be done. Luckily, all those little pieces are now finished, so it's plain sailing from here, I hope.
Won't be powdercoating the frame, just all the little brackets etc.

Offline bazza

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Re: RD350 Dirt Tracker
« Reply #157 on: March 26, 2014, 06:51:49 am »
Pete coming along well
Once you go black  you will never go back - allblacks
Maico - B44 -1976 CR250- 66 Mustang YZF450,RM250
Embrace patina

Offline SlideRulz

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Re: RD350 Dirt Tracker
« Reply #158 on: March 26, 2014, 07:30:11 am »
Looking good Pete :P

Offline yamaico

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Re: RD350 Dirt Tracker
« Reply #159 on: March 28, 2014, 10:43:18 pm »
The weather's no good for painting so the forks got the attention. Shortened 60mm, cut the old caliper bracket off, welded on the lug for the brake backing plate. stripped the black paint and buffed the forks and triple trees. New seals and oil - ready to go. Left the mudguard brackets there in case a fork brace is required.


Offline yamaico

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Re: RD350 Dirt Tracker
« Reply #160 on: March 30, 2014, 05:40:37 pm »
Got a bit of a break in the weather so the frame got painted. The conditions were not ideal but time is running out so it had to be done today



In between coats the engine got stripped and I started to clean the cases up. Don't know what sort of chain lube the previous owner used but it took some getting off.



I'll start zinc plating the nuts and bolts tonight so the motor can go back together.

Offline firko

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Re: RD350 Dirt Tracker
« Reply #161 on: March 30, 2014, 05:42:18 pm »
 ;D ;D ;D ;D
'68 Yamaha DT1 enduro, '69 Yamaha 'DT1 from Hell' '69 DT1'Dunger from Hell, '69 Cheney Yamaha 360, 70 Maico 350 (2 off), '68 Hindall Ducati 250, Hindall RT2MX, Hindall YZ250a , Cycle Factory RT2MX flat tracker, Yamaha 1T250J, Maico 250 trials, '71, Boyd and Stellings TM400, Shell OW72,750 Yamaha

Offline yamaico

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Re: RD350 Dirt Tracker
« Reply #162 on: March 31, 2014, 01:37:15 pm »
Got some of the frame loosely assembled last night.



Tonight the bottom end of the motor can go together and tomorrow afternoon I will start on the tank and seat. Already have the white base painted on, just need to let it dry thoroughly before the masking starts.


Offline yamaico

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Re: RD350 Dirt Tracker
« Reply #163 on: April 02, 2014, 08:56:38 am »
Got the tank and seat painted last night. Just need to make and apply the stickers and then apply a coat of clear. The blue is actually a lot darker than it looks in the photo - photography is certainly not a strong point for me. Not too sure if I like the design or not, have to see what it's like all together.



The bottom end of the engine is all assembled, just need to paint the heads and barrels and hone the bores and it can all go back together. Not too much going to happen for the rest of this week as we're off to NZ tomorrow for the first round of the SGP - can't wait.

Offline SON

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Re: RD350 Dirt Tracker
« Reply #164 on: April 02, 2014, 07:35:19 pm »
Your not mucking around Pete
Looking good