KR-1 /KR-1S

[2TInstitute]

Does anyone realise how good these babies are? I'm in the lengthy process of converting one into something special. I have been collecting bits like 54 X 54mm , mx cylinders, 90 deg crank, programmable ignition, rm 125 carbs, TYGA body work. Be painted orange and be no 'BULL' with it.

[w3a51l]

How about some before and after photos?

[2TInstitute]

Here's a hint see if you can join the dots

[hybrid]

I like!

[Antman]

Good but a very fragile bike ,otherwise nice finish

[2TInstitute]

Fragile RGV 's I build have 65HP on the wheel with a fat mid range with just bolt on bits.

Anyways got hold of a fairing to make my moulds off and hard to belive the donor fairing fitted like glove. Most of the mounting holes lined up. A before pic will be here shortly

[ash33]

Wasn't it only the first ones that had reliability issues. The later KR1 were quite good, not to mention faster than the RGV in stock trim.

[HM31A]

Fragile RGV 's I build have 65HP on the wheel with a fat mid range with just bolt on bits.

Anyways got hold of a fairing to make my moulds off and hard to belive the donor fairing fitted like glove. Most of the mounting holes lined up. A before pic will be here shortly

did i miss the before/after pic?

[rodeobob]

something about the cranks pounding out the cases or something if i remember right.

Thats the tandem twin so not the KR1-S


Woah, my head hurts, that was years and years ago.


Bob.

[2TInstitute]

Fragile RGV 's I build have 65HP on the wheel with a fat mid range with just bolt on bits.

Anyways got hold of a fairing to make my moulds off and hard to belive the donor fairing fitted like glove. Most of the mounting holes lined up. A before pic will be here shortly

did i miss the before/after pic?

No pics I just mocked up at home. I have t cut the belly pan to make it fit. I didn'y want to do that til I had the copies. I have those now so I'll get around to that.

Yes bob the cranks are a bit how you going, mainly because of the thrust washers being to thin, and usualy cry enough when switched to pre-mix and run on less than 20:1 oil.
The tandem twin in another frame , maybe RGV/NSR/TZR would make an awesome bike. I have a pair of cylinders here that will be basicaly copies of Aprilia GP cylinders. The owner will be machining up disc covers to rid then of the dicky 'reed before the disc valve' thing with a 115mm rods and Mito pistons, some pipes and an ignition it should go very hard. Would be nice to convert it to twingle firing also.

[peet]

hi lozza
how many set of fairings are you going to knock up
be a shame to go to all that to only make 1 set.
ill put my hand up for as set
going to do the rear seat unit as well.
cheers peet

[2TInstitute]

Yep seat is being done also, I don't have an original that was off a mates tail. Will let you know when they pop out of the mould. They are flat out ATM getting ready for Phillip Island in 2 weeks.

[ozgamma]

I have a KR1-R . 150 made and most destroyed by Kamikazi pilots in Japan prody racing . Few outside of Japan . R's had 35mm Kehins , close ratio gearbox . upgraded clutch springs , programable igniter box.


KR-1 WORLD REGISTRY - Models, Frame Numbers and Engines MODEL IDENTIFICATION

KR-1 FAMILY TREE......edited
THIS IS THE (SUGGESTED) SPLIT ON MODELS...
we need YOUR DATA to help determine actual frame quantities/clusters - and what countries they went to

Model:
KR-1 (B1,B2), KR-1S (C1,C2, C3), KR-1R (D1, D2)
1988 KR250-B1 = KR250B-000001- 004000
1989 KR250-B2 = KR250B-004001- 005000? (guess) 5760 (KRDUM)
1989 KR250-C1 = KR250C-000001-
1990 KR250-C2 = KR250C-001001-
1991 KR250-C3 = KR250C-006801- 9000? (guess)
1991 KR250-C3A (NZ SP) = KR250C-006851-6855? 007341-007344?
1989 KR250-D1 = KR250C-300001- 300130?
1990 KR250-D2 = KR250C-300501- 300550?

Colour Choice:
Lime Green/Polar White (B1, B2)
Firecracker Red/Polar White (B2)
Ebony/Metallic Zeus Blue (C1) regarded RARE colour
Ebony/Lime Green (C1, C2)
Lime Green/Blue 24/Pearl Alpine White (C3/C3A) prolific, probably C2 also?
Firecracker Red/Pearl Gentry Gray (C3) (grey calipers)
Lime Green/Pearl Alpine White (C3) (grey calipers)
Ebony/Lime Green (D1, D2) regarded RARE model

[Jeram]

nice post...

I didnt even know there was a KR-1R, nice.


The KR1R is only trumped by the X-09!


the most "secret" of GP250 bikes!



"
Kawasaki racer developed, X-09 is wearing the cowl in an ordinary machine looks. Kawasaki X-09 (type 2-cylinder 250cc 2st V model year 1993)



However, it stripped off the cowl and look unique identity appears









Is characteristic of the exhaust pipe maneuverability , especially in the left side of the exhaust pipe is big Unetsu are. This X-09 has a V-twin engine while maintaining the layout, rather than the usual two-cylinder V-type, the Bank opened its way down the V because it has the structure of the last generation say Observations




More air intake funnel around the decelerating the air and, stable supply of a large air box to
be able to install.

Twin-spar frame Hakanari high rigidity is like the ones that were used.







Radiator for water-cooled engine is a V-shaped and recessed into

Radiator as much as possible, placed in the front if you, interfere with the tire just before I just can not be placed in front until the V-shaped in that it placed in the front than to avoid interference with the tire could not be . This also can be made from the twin-spar frame is empty is. This air box is in the frame through the fresh air is introduced. And cowl also for introducing new air ducts and open mouth.



The lower cowling for the cooling air inlet ducts dry clutch there. It is equipped with no less even heard of racers at the start to the long half clutch to use must keep racers on is enabled equipment will say. Incorporate new equipment and new mechanisms only this X-09 , but racer replica unfortunately released, let alone racer even in 1993 the last development was aborted . Already during the era of replica racer too, the era of naked models moved in I went. And ironically naked models with the initiative of the Kawasaki did. Zephyr 400 (Year 1989)



source : http://minekaze.exblog.jp/14819839/

I often wonder whether the upside down V twin was less seizure prone due to the added benefit of gravity. (oil running down the bore to keep it lubed) but I guess that gravity is a tiny force compared to the pumping piston 'sweeping' the bore and turbulent flows and 130000RPM.
somewhat similar to a car windscreen o0n the highway in a rainstorm.
sure gravity is a constant so is pulling the water down when the blade sweeps past but the wind velocity still is the major force which pushes the water 'up'.

[EPApolice]

I want a KR1-R but cant see it happening any time soon. My track bike KR1 will have to do for now.