i have a 94 MK3 and never thought to research the mech diff between the years. i know the 93 started the linked brake syst, but do the earlier bikes have the same carb jetting, compression, etc
thanx

 

MK 1 & Mk 2 carbs are different from MK 3 and distinct from themselves too


Coolant System and head fittings for coolant are different on the MK1

Each gen has different brakes

Rims are narrower on the MK1

Speedo is driven from front wheel on MK 1

Plastics and Gauges are distinct for each generation

R/R is diff for Mark 1 and some electrics & controls too

seats for Mk2 & 3 are same , MK 1 is diff

Petcock for Mk2 & 3 are same , Mk 1 is diff not vacuum actuated but a manual petcock

Headlight for MK1 not same as 2 & 3

Rear shock is different for mK1 - shorter and slightly wider diff construction
but you can interchange

Forks are diff - anti dive on the Mk1 - same fork diameter tho - triple is diff too

Hell there's more but this is the readily available stuff that comes to mind right now

Gear shift linkage is diff on MK1

Fuel tank for all three are different

Carb jetting is same imo as I run MK2 carbs on a MK1 bike - and it runs better than
the MK1 carbs it came with - no alterations

MK 3 carbs are a straight bank - mk2 and 1 are a "V" shaped bank so carbs intakes
and ariboxes etc for a Mk1 or 2 will NOT work on a MK3 Gen Bike unless you change
airboxes and intake rubbers.

Like wise a MK3 carbs will not retrofit to a MK1 , 2 unless you make the appropriate
changes as described above

imo MK2 carbs were the best breathing most responsive of the three diff designs

Almost thinking of modding my MK3 to run with MK2 carbs I'm that convinced
of it

 

Alternator and tail lights on Mk 1 are different to Mk2 and 3
Mk1 bodywork won't fit Mk2 and 3 but mk2 and 3 are interchangeable as a set.

 

Front footpeg hangers were shorter on a Mark 2 compared to Mark 1 (more rearset?)

Cheers, SB

 

thanx for the replies. i was more cuious about mechanical as in engine and carbs. i found my 81 Yamaha 1100 has smaller carb jetting than the 78, 79 because of U.S. emissions and i find it lacks the power of previous years. was wondering if MK1, MK2 are faster in stock config

 

Hey you guys forgot the pulse generator and the fact that the '94 is by far the best looking.

All years were made lean due to emissions. That would include all manufactures.

There are also Cali models w/cali emissions and some Euro models had necked down carb boots to reduce HP.

 

thanx TBT. ditto on the best looking. anyone familiar w/US Cart open wheel racing would agree it has Penske Racing colors minus the Marlboro sponsor decals. thats what first caught my attention when i saw the first 1 on the street. im not tryin to start any disagreements, cause just like women, its all in the eyes of the beholder, and shes my bitch!

MotoGP
open wheel F1 Racing/IndyCar fan

 

mjp, a couple of things I would suggest to get her to purr is,

(1) K&N air filter with Jet kit --> LINK you don't need to supply an e-mail address, just click on [see results] lower left of that screen.

(2) Stick coils --> LINK#1 How to LINK#2

Those two mods above can be done for under $100 USD and will make a difference. Its the best way to get your carbs working for you. Even if other year carbs had the slightest gain, you still would need to rejet to make up for the ethanol in the gas.

The stick coils produce a hotter spark to light off the new mixture. I am extremely glad I did them and have no other plans for further mods. I do however have a TB slip-on and jetted to it.

 

i have a K&N filter, not pods and a TB slip-on with factory jets. the fsm doesnt spec what size the jets are. do you know what the factory main and slow jet sizes are for the 94 and are they mikuni?

 

Dub