Author Topic: MX80 project  (Read 3374 times)

0 Members and 1 Guest are viewing this topic.

Offline frostygt80

  • Yama-God
  • ******
  • Posts: 1378
Re: MX80 project
« Reply #10 on: May 05, 2009, 08:51:13 PM »
yeah you can pick mx and dt 80's up cheap gt's although similar in many ways seem to sell for a bit more are you going to get the oil tank and airbox setup like original not a bad setup how it tucks behind the oil tank in a small box other wise you can a uni filter just the green straight on to carby type but that will hight the fram the stock had a 90 degrees bend rubber intake off the airbox you probably already know that are you going to set it up with the oil pump working again i just seen the scrap yard one has the airbox all the mx80 gt80 dt80 were setup up like that i like the airbox on my 76 r250 easy to get at straight under the seat thats the only pain with the mx/gt/dt airbox can be a pain to get to to clean they are a really good bike the mx's they sound good through the small pipe and when done they go alright aswell not a race bike or anything but a fun little bike i went from my gt80 to the pe400 big power difference not that i hadnt been riding all my life no accidents on the 400 yet thanks Michael. :)
1971 TM400 widowmaker PE400's want a few more PE400's

Offline 4V5

  • MODERATOR
  • Yama-God
  • *****
  • Posts: 11210
Re: MX80 project
« Reply #11 on: May 05, 2009, 09:23:22 PM »
Gidday Michael, I'll be using a unifilter for the time being, I'll suss if I can get an angle one, haven't had a real look to what I need but I suppose I should. the airbox is there on the scrap yard one but I'm sure I haven't got the lid... may do I have another half a frame with the airbox and it might have the lid, funny feeling it does. don't really matter until I find the carb joint anyway. love to use the autolube but I'll have to work out a quick bodge on a tank until I find one, might fabricate something for that soon. all the pump is there and clean I've only had one autolube pump fail in close to 60,000km out on the road and it probably was knackered to start with... was in an unknown engine I dropped into my LC when it needed one... I do trust them.

I'm expecting it to be a bulletproof little bike, should be good when it's done.

Cheers!
Leslie
IT465x4 IT400C IT175F YZ465G YZ250C YZ250WR XJ650G RD350LC RD250LCx5 DT175Nx3 TW200x2 DT200L DT200R RT3 RX100G GT80F YZ80L PW50J KH250B1 KZ250D1 PE175C TS250ER TS185ER AG175B AG100

Offline frostygt80

  • Yama-God
  • ******
  • Posts: 1378
Re: MX80 project
« Reply #12 on: May 05, 2009, 10:56:45 PM »
yeah the autolube works great i have two bikes with it the gt80 and rd250c those bits are easy to find many years suit should be one floating around at the wreckers carb joint reguarly on us ebay cheap uni filter will work fine but there will be a blank spot there thanks Michael.
1971 TM400 widowmaker PE400's want a few more PE400's

Offline 4V5

  • MODERATOR
  • Yama-God
  • *****
  • Posts: 11210
Re: MX80 project
« Reply #13 on: May 07, 2009, 10:36:11 PM »
7 days and a grand total of $250...... got the little beastie running today, started on the 5th kick!! really surprised as I didn't set the points, just put the plate back in... I'd seen it throw spark but throwing a spark and running is two different things sometimes but it seems to be OK. have no tools to check it (only bike I have that's running with points) so I'll leave it alone..

rode it around and around and around the clothesline until I got dizzy, took a real dodgy clip of it idleing and parked it up.

http://s52.photobucket.com/albums/g3/steelboots/?action=view&current=SV_A0078.flv

total stands at one piston circlip, one kick idler gear circlip a pair of crank bearings a sparkplug and a unifliter pod. all the seals were reused and so were the gaskets....... ;D doesn't leak oil so really happy.... it is new oil too I'm not that dodgy. the gaskets seemed new(ish) and came away cleanly on dissasembly and the seals were the same clean and soft. any nut/bolt washer/spring or clip that wasn't good enough came from the parts supply I have... none of that was new, just better. there isn't one dodgy part one the whole bike (the only dodgy thing got off after getting dizzy...)

still needs the oil tank, a new throttle cable would be nice but I'll look in the parts tub with all the cables and see what I can make. the back wheel is shot, absolutely shot... but the rear wheel off my YZ80H seems identical and has a better tyre, it's hub is covered in black paint and the rim isn't the greatest so I'll swap it and respoke the MX hub to a better rim for the YZ, seems a fair deal.. ::)

project YZ80H starts Saturday, I'll give myself 7 days and $0 again to have another bike running!!

Cheers!
Leslie
IT465x4 IT400C IT175F YZ465G YZ250C YZ250WR XJ650G RD350LC RD250LCx5 DT175Nx3 TW200x2 DT200L DT200R RT3 RX100G GT80F YZ80L PW50J KH250B1 KZ250D1 PE175C TS250ER TS185ER AG175B AG100

Offline Samsonite

  • Yama-Rookie
  • **
  • Posts: 101
Re: MX80 project
« Reply #14 on: May 07, 2009, 10:41:35 PM »
Nice project you have there! Just like my KD100. I bought it for 50 bucks and only put 50 bucks into it. Re-ringed the engine, reused all seals, made a cardboard head gasket. Damn thing always starts 1st kick and is super reliable. Only problem is it will when shifting into 4th it'll go into a false neutral once in a while. I also ported it out a little so its a got a bit more oomph.  ;D

Offline Evan

  • Yama-Hero
  • ****
  • Posts: 339
Re: MX80 project
« Reply #15 on: June 05, 2009, 02:56:58 AM »
looks like my KD80  :P
1986 Yamaha IT200S
1984 Yamaha IT200L "The Pit"
1984 Yamaha XS650 Heritage Special
1993 Honda Z50R - Stuck In Third!

Offline coza77

  • Yama-God
  • ******
  • Posts: 2069
  • IT200N
Re: MX80 project
« Reply #16 on: June 05, 2009, 09:25:24 PM »
LOVE ME 80S
I used to ride all day....now IT takes me all day to ride..
IT175 J
IT200 N
YZ250 H
YZ250 J
WR250 93
DT200
YZ450F
TTR 50
TTR 110
CR125 RD
RZ 250
KDX 200
FXSTC 1340 Harley 91
POCKET ROCKET

Offline frostygt80

  • Yama-God
  • ******
  • Posts: 1378
Re: MX80 project
« Reply #17 on: August 27, 2009, 09:33:55 PM »
Does any one have on of these like Leslies it is the exact same as my one that went in the bushfires at a mates place so sooner or later id like another one thanks Michael.
1971 TM400 widowmaker PE400's want a few more PE400's

Offline 4V5

  • MODERATOR
  • Yama-God
  • *****
  • Posts: 11210
Re: MX80 project
« Reply #18 on: August 20, 2014, 02:50:45 PM »
HEY GRIFFO!!  Giz update on the little MX? how has the last 5 years treated it?

...does it still run?


...... did it ever need crank seals  :P ;)

........... and could even the fonz out cool this pic?




aaaaye
IT465x4 IT400C IT175F YZ465G YZ250C YZ250WR XJ650G RD350LC RD250LCx5 DT175Nx3 TW200x2 DT200L DT200R RT3 RX100G GT80F YZ80L PW50J KH250B1 KZ250D1 PE175C TS250ER TS185ER AG175B AG100

Offline rodeobob

  • Yama-God
  • ******
  • Posts: 5137
Re: MX80 project
« Reply #19 on: August 22, 2014, 02:14:37 AM »







Are they his real teeth or did the front guard bust off when it hit band and lodge in his mouth????
DT200R- Im for sale
DT175 '90
RG250WD
Builds in progress.
TIT175
YZ200WR 
RZ250K- Im gunna be special.
VictIT- A very sad Victa 8-34E (8HP 34") Ride on that im going to set right. IT175 motored racing mower, i mean how can you call it a Victa if its not a 2T.