Mr_Dunev
I have no idea what I am doing
Been working on this bike for a few months and decided I might as well do a build thread.
I bought this bike a few months ago, to give either Vintage MX or Flat Track a try. I decided to go with flat track for now. I'll build an MX bike later.
So far here is a list of the mods.
Webco Head
GYT Cylinder
Ceriani front end
Koni Shocks
Torque Engineering Pipe (Soon to be swapped out for a low pipe)
Engine dropped 2"
I couldn't wait to test her on the track so I cleaned the carbs, replaced the crank seals, replaced a sheared woodruff key and took her out and raced her in the Open Knobby Class at the 1/8 mi dirt track.
Here is a video of her in my alley way before the race
https://www.youtube.com/watch?v=ccnyZO0Rdpk
Had a blast racing, but didn't do very well against modern CRF450's and YZ250's. Out of a dozen bikes there were only 2 "older" bikes that were in my class. A 90's DR350 and a '72 RT2MX-360. Needless to say I didn't win ;D
With knobby tires I can only race the Open Knobby class, but with flat track tires I can race the Vintage 250 class.
I decided I wanted to race it properly so I decided to start doing some shopping for parts.
Here are some parts I bought last month at an AHRMA swap meet.
The wheel I bought had a hub that was 7.5" so I had to sell it and buy another one. But that one also ended up being wrong, so I am on the search for a Barnes quick change Hub laced to a 19" aluminum rim. Then I have to mount a rear disc brake, which will probably be off of an RD400.
It's my birthday this weekend, and I wanted to race so I have been working on my bike all week trying to get her into race mode!
I bought a 19" Aluminum spooled front wheel on ebay, and slapped a Maxxis DTR-1 tire on her. I still haven't changed the rear wheel so it stock and put a Dunlop K70 on that i had lying around.
Pulled the head to check the top end and it doesn't look good. So I am using a spare top end that I have for the weekend. I already honed the cylinder and it should be going on the bike tonight. I'll have the original top end rebuilt in the next couple weeks.
Here are some photos of the old top end. Looks like it might have soft seized once or twice ;D
I had AMS Racing overnight some sprockets to me. The sprocket on the bike was a 44 and I went up to a 52 since I am only racing 1/8 mile still. I plan on also racing 1/4 mile, but i'll worry about re-gearing the bike for that later.
Changed out the sprocket in the back of my truck last night. P.S the harbor freight Dirt bike stand is WAY too high for a lowered flat track bike.
I don't have the tools to put a new chain on so the bike she is at a shop down the street having one put on. Tonight I am putting the New(ish) top end put on, and then i'll do a compression check to make sure everything is in working order. Wont be able to get the Champion seat/tank painted for a while so I am sticking with the old seat and tank. I'll probably paint something on the tank in the next day or so, just so it isn't so plain.
Tomorrow a buddy is coming over to help me weld up and fix the low pipe i have, so fingers crossed i'll have it done before the race on Sunday. I also still need to cut and re-weld the brake lever as it is much too high.
I'll keep posting updates as I go.
I bought this bike a few months ago, to give either Vintage MX or Flat Track a try. I decided to go with flat track for now. I'll build an MX bike later.
So far here is a list of the mods.
Webco Head
GYT Cylinder
Ceriani front end
Koni Shocks
Torque Engineering Pipe (Soon to be swapped out for a low pipe)
Engine dropped 2"
I couldn't wait to test her on the track so I cleaned the carbs, replaced the crank seals, replaced a sheared woodruff key and took her out and raced her in the Open Knobby Class at the 1/8 mi dirt track.
Here is a video of her in my alley way before the race
https://www.youtube.com/watch?v=ccnyZO0Rdpk
Had a blast racing, but didn't do very well against modern CRF450's and YZ250's. Out of a dozen bikes there were only 2 "older" bikes that were in my class. A 90's DR350 and a '72 RT2MX-360. Needless to say I didn't win ;D
With knobby tires I can only race the Open Knobby class, but with flat track tires I can race the Vintage 250 class.
I decided I wanted to race it properly so I decided to start doing some shopping for parts.
Here are some parts I bought last month at an AHRMA swap meet.
The wheel I bought had a hub that was 7.5" so I had to sell it and buy another one. But that one also ended up being wrong, so I am on the search for a Barnes quick change Hub laced to a 19" aluminum rim. Then I have to mount a rear disc brake, which will probably be off of an RD400.
It's my birthday this weekend, and I wanted to race so I have been working on my bike all week trying to get her into race mode!
I bought a 19" Aluminum spooled front wheel on ebay, and slapped a Maxxis DTR-1 tire on her. I still haven't changed the rear wheel so it stock and put a Dunlop K70 on that i had lying around.
Pulled the head to check the top end and it doesn't look good. So I am using a spare top end that I have for the weekend. I already honed the cylinder and it should be going on the bike tonight. I'll have the original top end rebuilt in the next couple weeks.
Here are some photos of the old top end. Looks like it might have soft seized once or twice ;D
I had AMS Racing overnight some sprockets to me. The sprocket on the bike was a 44 and I went up to a 52 since I am only racing 1/8 mile still. I plan on also racing 1/4 mile, but i'll worry about re-gearing the bike for that later.
Changed out the sprocket in the back of my truck last night. P.S the harbor freight Dirt bike stand is WAY too high for a lowered flat track bike.
I don't have the tools to put a new chain on so the bike she is at a shop down the street having one put on. Tonight I am putting the New(ish) top end put on, and then i'll do a compression check to make sure everything is in working order. Wont be able to get the Champion seat/tank painted for a while so I am sticking with the old seat and tank. I'll probably paint something on the tank in the next day or so, just so it isn't so plain.
Tomorrow a buddy is coming over to help me weld up and fix the low pipe i have, so fingers crossed i'll have it done before the race on Sunday. I also still need to cut and re-weld the brake lever as it is much too high.
I'll keep posting updates as I go.