YSR50 Rebuild

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tacky1
Posts: 957
Joined: Wed May 13, 2015 1:11 am
Location: Pacifica,,

YSR50 Rebuild

Post by tacky1 »

Any YSR500, oops, YSR50 love out there :)
Picked up both these in San Francisco for a song, Boxes and boxes of spares, Both are running, Little flyers, Came with a bung of nice goodies, Team Calamri wheels, triple and fork clamps, handle bars, fork spring conversion kit, exhaust, 24mm carb kit and fancy fuel cap and a few other bits.

I stripped the Red/White down during the week and sent all the metals out for powder coat, its a matching numbers bike, The other bike is going to my eldest son for a project, I swapped over the bits I needed and hes good to go.

Engine stripped down, Im replace the main bearings and seals, the left seal was totaled, It passed a leak down test, but the seal splits when pressed, it was rock hard, glad I got in there,
The cylinder is lightly ported, Might be a Calamari job, I sent the cylinder out for a rebore, Its in good shape, but the piston is a little worn, They are going to fit a Wiseco, The bead has been modded, squish was machined etc.
Rekeyed the ignition and helmet lock, Both on a set of A-Keys and barrels I had in the key bin.

This is as far as I got, pics will follow as I go along :)

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1985 RZv500
1984 RZ500 Hybrid
1986 RG500 Walter Wolf
1986 RG500 Skoal Bandit
1984 RZ350
1984 RZ350 Hybrid
1981 RD350LC
1981 RD350LC Hybrid
2009 CR500AF Supermoto 250X
2007 CR500AF 250X
1988 YSR50 (2)
1984 GPZ750 Turbo
1989 VFR750R RC30
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JonW
Posts: 10607
Joined: Sat Oct 10, 2009 4:33 am
Location: Sydney
Contact:

Re: YSR50 Rebuild

Post by JonW »

Very cool projects indeed! great find!

Cant wait to see this one progresses.
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid

Like Watches? www.PloProf.com & www.DeskDivers.com
85RZwade
Posts: 396
Joined: Tue Nov 12, 2019 5:49 pm
Location: Southwet Washington

Re: YSR50 Rebuild

Post by 85RZwade »

I predict you will find yourself in a lot of trouble with the little monsters. They're big fun in a small package
85 RZ350 daily rider Toomeys, FZ swinger & wheel, Fox shock, Raasks
85 RZ350 JLs, FZ swinger, Katana rear & CBR929 front wheel, CBR600F4 forks & brakes
75 RD350 Ritter-tuned top end, PWK28s, JLs, HPI, TDR wheels, GSX-R forks, Motolana swinger
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kpke
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Posts: 2547
Joined: Sun Nov 23, 2008 2:22 pm
Location: Livermore, CA

Re: YSR50 Rebuild

Post by kpke »

RZ350 engine transplant tacky. Or one of your CR500 engines. Please. Thank you.
85RZwade
Posts: 396
Joined: Tue Nov 12, 2019 5:49 pm
Location: Southwet Washington

Re: YSR50 Rebuild

Post by 85RZwade »

See? TROUBLE :smt018
85 RZ350 daily rider Toomeys, FZ swinger & wheel, Fox shock, Raasks
85 RZ350 JLs, FZ swinger, Katana rear & CBR929 front wheel, CBR600F4 forks & brakes
75 RD350 Ritter-tuned top end, PWK28s, JLs, HPI, TDR wheels, GSX-R forks, Motolana swinger
tacky1
Posts: 957
Joined: Wed May 13, 2015 1:11 am
Location: Pacifica,,

Re: YSR50 Rebuild

Post by tacky1 »

LOL, I see a dangerous pattern here Ken :P
1985 RZv500
1984 RZ500 Hybrid
1986 RG500 Walter Wolf
1986 RG500 Skoal Bandit
1984 RZ350
1984 RZ350 Hybrid
1981 RD350LC
1981 RD350LC Hybrid
2009 CR500AF Supermoto 250X
2007 CR500AF 250X
1988 YSR50 (2)
1984 GPZ750 Turbo
1989 VFR750R RC30
User avatar
Evans Ward
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-----
Posts: 1546
Joined: Sun Jun 07, 2009 6:39 pm
Location: Macon, GA

Re: YSR50 Rebuild

Post by Evans Ward »

I remember one year at Deal’s Gap years ago when a lanky dude from up north about 6’ 4” unloaded a super nice black YR50 and then ran the Dragon (318 curves in 11 miles one way) round Trip . He returned, loaded up, and left. Didn’t know him but he looked like the proverbial monkey on a football, legs all over the place when riding this. Must have been prepped well. Cool little bikes fetching a lot of coin these days,
84 RZ350-Toomeys,SCR milled head, stk 26 carbs,300 M, 35 P, stock regrooved needles AS 2.5 turns out,stk air box,Banshee reeds Zeel non-progr CDI,TSRL Program YPVS,alum rad,R6 shock,GV emulators w/RT springs,fork brace,Shindy steering damper.
tacky1
Posts: 957
Joined: Wed May 13, 2015 1:11 am
Location: Pacifica,,

Re: YSR50 Rebuild

Post by tacky1 »

More progress, Wheels were stripped and the metal polished!! I dont like polished metal..... BUT, It is what it is.......
Hubs sanded and repainted,
Engine is back together, New crank bearings and all seals replaces, Waiting on the cylinder to come back from a rebore.
New clutch plates and springs, gaskets etc,
Stripped and painted the outer covers, They were pretty badly corroded, Look a lot better now :)
Switches stripped and painted, waiting on the decals to finish them off,
Lots of other bits and pieces completed, all wiring has been repaired, harness all cleaned up and re-taped.
Waiting on the frame and all the metals to come back from the powdercoater.

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1985 RZv500
1984 RZ500 Hybrid
1986 RG500 Walter Wolf
1986 RG500 Skoal Bandit
1984 RZ350
1984 RZ350 Hybrid
1981 RD350LC
1981 RD350LC Hybrid
2009 CR500AF Supermoto 250X
2007 CR500AF 250X
1988 YSR50 (2)
1984 GPZ750 Turbo
1989 VFR750R RC30
User avatar
Evans Ward
-----
-----
Posts: 1546
Joined: Sun Jun 07, 2009 6:39 pm
Location: Macon, GA

Re: YSR50 Rebuild

Post by Evans Ward »

Looking really good!
84 RZ350-Toomeys,SCR milled head, stk 26 carbs,300 M, 35 P, stock regrooved needles AS 2.5 turns out,stk air box,Banshee reeds Zeel non-progr CDI,TSRL Program YPVS,alum rad,R6 shock,GV emulators w/RT springs,fork brace,Shindy steering damper.
User avatar
JonW
Posts: 10607
Joined: Sat Oct 10, 2009 4:33 am
Location: Sydney
Contact:

Re: YSR50 Rebuild

Post by JonW »

wow fast progress!
80 XT500 Supermoto!
81 RD350LC Resto
82 RD421LC Hybrid
82 RD350LC decapitation project
82 RD250LC JDM '251LC' YPVS
83 RZ350 Resto
84 RZ500 Resto
85 RZ350 F1 Resto
86 RZ350 F2 Resto
86 RZ350 F2 Hybrid

Like Watches? www.PloProf.com & www.DeskDivers.com
tacky1
Posts: 957
Joined: Wed May 13, 2015 1:11 am
Location: Pacifica,,

Re: YSR50 Rebuild

Post by tacky1 »

Bored Jon. Lol. The covid rebuild. I was in the garage yesterday morning at 7am and finished up at 11.30 last night 😂
1985 RZv500
1984 RZ500 Hybrid
1986 RG500 Walter Wolf
1986 RG500 Skoal Bandit
1984 RZ350
1984 RZ350 Hybrid
1981 RD350LC
1981 RD350LC Hybrid
2009 CR500AF Supermoto 250X
2007 CR500AF 250X
1988 YSR50 (2)
1984 GPZ750 Turbo
1989 VFR750R RC30
tacky1
Posts: 957
Joined: Wed May 13, 2015 1:11 am
Location: Pacifica,,

Re: YSR50 Rebuild

Post by tacky1 »

Engine is complete, Carbon reeds fitted and I modded the cage, get more of a flow through it.I also fitted a new 24mm flatslide carb, A lot better than the stock 16mm carb!!! It was a PITA to get the OEM throttle cable to work with it, I want to keep the oil pump, No pre-mix... I drilled the carb and fitted an oil injector..
I removed the little cable end and cut back the outer cable, Got my length right and re-soldered on the end, Works perfect, nice to have an OEM cable, they just work that much smoother.
The oil pump cable is held in with this snazzy little clip, Nice, havent seen one of these before :)
I also drilled two little holes in the barrel fin right beside where the exhaust bolts to the cylinder.
The OEM way is the shits, this way the springs will be good and solid.
Still waiting on the frame and bits.....

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1985 RZv500
1984 RZ500 Hybrid
1986 RG500 Walter Wolf
1986 RG500 Skoal Bandit
1984 RZ350
1984 RZ350 Hybrid
1981 RD350LC
1981 RD350LC Hybrid
2009 CR500AF Supermoto 250X
2007 CR500AF 250X
1988 YSR50 (2)
1984 GPZ750 Turbo
1989 VFR750R RC30
85RZwade
Posts: 396
Joined: Tue Nov 12, 2019 5:49 pm
Location: Southwet Washington

Re: YSR50 Rebuild

Post by 85RZwade »

Super clean! Great work, and fast, as mentioned above. Go, man go!
85 RZ350 daily rider Toomeys, FZ swinger & wheel, Fox shock, Raasks
85 RZ350 JLs, FZ swinger, Katana rear & CBR929 front wheel, CBR600F4 forks & brakes
75 RD350 Ritter-tuned top end, PWK28s, JLs, HPI, TDR wheels, GSX-R forks, Motolana swinger
User avatar
Smoker
Posts: 4785
Joined: Sun Mar 23, 2008 8:08 pm

Re: YSR50 Rebuild

Post by Smoker »

Very nice work. :smt023

Enjoying this build a lot.
tacky1
Posts: 957
Joined: Wed May 13, 2015 1:11 am
Location: Pacifica,,

Re: YSR50 Rebuild

Post by tacky1 »

Thanks guys. Kinda stuck now till the frame and bits get here.
1985 RZv500
1984 RZ500 Hybrid
1986 RG500 Walter Wolf
1986 RG500 Skoal Bandit
1984 RZ350
1984 RZ350 Hybrid
1981 RD350LC
1981 RD350LC Hybrid
2009 CR500AF Supermoto 250X
2007 CR500AF 250X
1988 YSR50 (2)
1984 GPZ750 Turbo
1989 VFR750R RC30
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