150 tyre on a Kr-1s

Bikemike · Post by **Bikemike** » Thu Jun 12, 2008 9:52 am

Is it worth fitting a 150 tyre instead of a 140?
I think it fits ok and I'm sure it would look better but I don't want to spoil the handling, I quite like the 'falls on its side' way it turns in and don't want to make it slower steering.
Any thoughts?

Mike

the-elf · Post by **the-elf** » Thu Jun 12, 2008 11:47 am

I'm running a 160 rear on a 5" rim with a 120 on a 3.5" front and it stills falls into the corner. Its a matter of getting the balance between the two right. On my old ZX10R I fitted a 180 rear instead of the standard 190 to get it to turn quicker

garye345 · Post by **garye345** » Thu Jun 12, 2008 12:08 pm

wouldnt have the foggiest mike

but i can tell you this for free,the 2 1s i have bought have both had 150s on

Matty21 · Post by **Matty21** » Thu Jun 12, 2008 12:32 pm

So say i decide to run bt 090's on my KR1 would that work? its a 1989 model.

The 090 is 150/60 18 is it? or is it the bt 92? hmm anyway.

would it work and help in any way? would i need to make any mods?

Matt

the-elf · Post by **the-elf** » Thu Jun 12, 2008 1:13 pm

Matty21 wrote:So say i decide to run bt 090's on my KR1 would that work? its a 1989 model.

The 090 is 150/60 18 is it? or is it the bt 92? hmm anyway.

would it work and help in any way? would i need to make any mods?

Matt

The KR1 has narrower rims than the KR1S, so No. Going up or down 1 tyre size is OK but not two as the tyre will be pinched and the profile changed completly. If you wanted to us a 150 then I would either fit a set of 1S running gear, and/or an RGV 17" rear wheel

Matty21 · Post by **Matty21** » Thu Jun 12, 2008 1:14 pm

which conversion is easiest and cheapest elf?

Post by **alimorg** » Thu Jun 12, 2008 1:48 pm

Matty21 wrote:which conversion is easiest and cheapest elf?

1s running gear its a straight swap you will need 1s rear wheel, and a complete front end (forks, calipers, discs, wheel, speedo drive) this will all just bolt straight on.

Having said that the RGV conversion opens up a wider choice of tyres, but I have never liked the swept spoke design of the RGV wheel - thats just my opinion though. You will also need to get some spacers made up to get the rgv wheel to fit.

I have been watching SV wheels on ebay recently as they are a straight spoke design (almost exactly the same as the KR-1) and are 17x4.5 but I keep getting outbid, when I find one cheap enough I will have a go at fitting that.

Cheers
AL

alanw · Post by **alanw** » Thu Jun 12, 2008 1:52 pm

Mike, I've tried this 2 or 3 times in the past for "road use" & never been happy. It has always compromised something else, or just changed the FEEL of the bike .............PS I might still take you up on that AA offer, One day. Alan

Matty21 · Post by **Matty21** » Thu Jun 12, 2008 3:33 pm

so for the KR1s wheel to go into my Kr1 cant i just change the rear wheel but keep same bearings spacers and disc and sprocket etc?

and if the sv rear wheel fits in without much hassle let me know.

Matty

the-elf · Post by **the-elf** » Thu Jun 12, 2008 3:37 pm

alanw wrote:Mike, I've tried this 2 or 3 times in the past for "road use" & never been happy. It has always compromised something else, or just changed the FEEL of the bike .............PS I might still take you up on that AA offer, One day. Alan

Yep I can understand that as it takes a bit of effort to find an ideal setup on the geometry. KR's have ground clearance problems anyway and it took me quite a few attempts to find a setup that worked well.

Garry · Post by **Garry** » Thu Jun 12, 2008 6:42 pm

rear wheel is straight swap - no need to change anything else - so cheap

i've got a 150 on a S rim for the road and i love it - guess it's down
to individual preferences

JanBros · Post by **JanBros** » Thu Jun 12, 2008 10:25 pm

alimorg wrote:I have been watching SV wheels on ebay recently as they are a straight spoke design (almost exactly the same as the KR-1) and are 17x4.5 but I keep getting outbid, when I find one cheap enough I will have a go at fitting that.

had a look at them to in the past, but dropped the idea because the total wheel + sprocketcarrier was too wide (won't fit the KR-swing arm).

in my KR1-SV there is a Bandit 400 rear wheel fitted : fit's with only needing new spacers

you also need the disc and complete rear brake, or you have to find a smaller disc that fit's the wheel.
downside is it's only a 4.00, but I've got a Michelin Pilot Power 160/60 on it and it looks ok. (see my topic for pictures

)

Bikemike · Post by **Bikemike** » Fri Jun 13, 2008 9:01 pm

Many thanks for all the replies guys, as ever.
Trouble is I think I'm more confused now

I think I'll wear the current set out first, then decide.

Mike