Posts
618
Joined
9/16/2012
Location
MN
US
Edited Date/Time
6/23/2020 3:54pm
Here is a pic of my 1981 YZ125H VMX racer
I removed about 10lbs off of the total weight
With the modifications.
Race tech suspension, lots of aluminum parts, and
Titanium custom machined bolts, bushings
I removed about 10lbs off of the total weight
With the modifications.
Race tech suspension, lots of aluminum parts, and
Titanium custom machined bolts, bushings
i would like to do something similar with my 1982 yz125j
The Shop
Early morning before show building filled up
About 200 plus bikes at show
can we have more details on the build?
For example, I know a lot of guys like to run 43mm forks and DLS front brakes from a slightly later YZ250/490. Are you running emulators? Tell us about the rear shock - does it have that trick multi-rate spring?
How does it feel vs a stocker not only from a suspension standpoint but weight and top-heaviness?
the engine - tell us about the build
Sorry - I am a YZ fanatic and was frequently one of the only YZ80/YZ125 mounted guys in my class in the early 90s around here.
The 80-81 bikes
The extra lbs would be a disadvatage. the overall goal was to
Reduce weight and improve handling
The stock 38 mm forks were the best 38 mm kyb
Of the day
The braking plates have been modified with
Bronze bushings on the cam's for extra power
(No play) and pressure
Engine
Cylinder ported, decked
Crank pin bored ,stuffed
Crank halves bored , stuffed
Transmission cut, polished, mil spec dry film coated
Barnett clutch parts
Head reworked
All bearings replaced
Kicker remanufactured
With A2 pin(drilled thru)
All screws replaced with
8mm Honda hex bolts
Wiseco piston
I am sure i forgot a few
More things
Hand machined shock
Res, with a high flow
3/8 id hose, cooling fins,
Standard air valve
Race Tech Gold valves(front / rear)
YZ465 spring
axle spacers/ Ti axle nuts
bearing spacers
Ti footpeg bolts
modified chain guide plate
Trick steering stem
Pro-form exhaust
modified air box/ new trick box hardware
New carb
reeds/ boot
Titanium bolts
Titanium foot peg mount bolts
for super smooth action
all hand machined , one at a time
Pit Row
series steel inserts pressed , staked and bored for
a super strength bearing bore, then Al/ni/brnz sleeves pressed
over the od of the hub add even more strength to the bearing
area
so this is a great place to post info on the bike
so i do not have to reply to all the emails
The frame was modified for strength, and
for ease of assembly.
I still have not made the trick skid plate i have
on the drawing board, with a few other items
sleeves (seal area) installed, remachined back to a slightly
oversize for more pressure on the seal lips
and dry film coated for a corrosion proof life
I also doubled up on the upper seals
I did three separate stems, so i have extra's
ready to go
I have yamaha yz 125 h (4v2) 1981
I need fork bushings : two bushings covered inside ( 38x42x12mm )
and two bushings covered on the outside ( 37x39x20mm )
Measured when squeeze bushing
Please help please write back
for example
danio8522@gmail.com
or 81
they are 7.00 each top , 10.00 each bottom
versus $40.00 each yamaha price
same kyb parts
You choose your Suzuki parts supply house
all kyb bushings(metal slides,or pistons
interchange from 77-85?
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