Trackday preparation

General queries KR Bikes
dirk
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Trackday preparation

Post by dirk » Tue May 22, 2018 9:31 am

Good Morning all :-)

I go to a race track training (Assen).
is a fast track.
the bike is standard.
my questions:
Is the oil pump sufficient or should there be additional oil directly in the petrol tank (1: 100 or more)?
what air pressure should be on the BT090?

Cheers!
Dirk
KR-1S 1990
RG500 1987
RGV 250 1992
TZR250 (2MA) 1987

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Virgie
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Re: Trackday preparation

Post by Virgie » Tue May 22, 2018 11:09 am

Morning Dirk, I used to run my standard wheel tyre pressures with either Bridgestone or Dunlop tyres at Front 26psi Rear 28 psi but you could add or subtract 1 psi on the rear to suit your riding. If your engine is standard I can't see a reason to add extra oil, but do use quality fully synthetic race oil. Also using super unleaded fuel would also help run a bit cooler.
Have a great day, I am very envious Assen is such an historic track.

mellorp
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Re: Trackday preparation

Post by mellorp » Tue May 22, 2018 5:19 pm

As Virgie says Super UL fuel (BP has no added ethanol/water). A new set of plugs and air filter won't do any harm. Make sure the engine is fully up to temp otherwise if you ride off and the thermostat suddenly opens you might get a cold seizure.

Tyre pressures depend on the day. The hotter it is the lower the pressure you can use.

Make sure your suspension is set up properly as you don't want the tyres to be doing the work of the suspension. You probably don't notice on the road but will on a circuit. If your tyres are overheating on the edges, it doesn't mean you are a riding god, but that your suspension might not be set up properly.

Make sure your brakes are in good order as again you might not notice on the road but will find out any deficiencies on a circuit.

Check chain adjustment lubrication and for tight spots. I run my chain with a bit more slack. Make sure the wheels are properly aligned

Finally take the mirrors and indicators off. Should you have a spill these are irreplaceable items

podman
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Re: Trackday preparation

Post by podman » Wed May 23, 2018 9:56 am

Your oil pump will provide all the lubrication the engine needs, adding too much oil knocks that coolness and energy out of your fuel and will cause you more problems , way too much will possibly even cause seizure..a lad on the LC forum believes has done just that the last couple of weeks.

lastly, im very jealous, have fun and stick some pictures up !

dirk
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Re: Trackday preparation

Post by dirk » Wed May 23, 2018 1:02 pm

Hi

Thanks for the tips.
I will then adjust the tire pressure.
Race oil .. I always take Motul 710.
in the RG500 without oil pump also Motul 800.
Motul 800 will be too viscous for the oil pump I think?
if possible I always take Aral Ultimate or at least Super Plus.
new spark plugs are in it.
Pistons only about 4000km (road use)
the crankshaft is about 8000km old.
I always do warm-up.
the suspensions is unfortunately old.
the fork is terrible as soon as the road surface gets bad. :shock:
luckily I have a steering damper
too soft at the back.
but I do not want to win a race either... or maybe :mrgreen:
motorcycle fairing
I must not fall ( also go to the church [-o< )
the Kawa was just Plan B.
actually I wanted to drive the RGV250 (with the RG500 I'm afraid with the 120er BT45 cutting disc on the rear wheel. :shock: )
but the suspension is even more frightful at the moment, and I'm waiting for new linear springs.

the carburetor jetting is standard.
i have only the needle a little lower (lean).
should I change the nozzles ??

Cheers!

By the way .. The RGV is already a good motorcycle.
Subjectively, the Kawa has the stronger engine and the sound is better around classes.
KR-1S 1990
RG500 1987
RGV 250 1992
TZR250 (2MA) 1987

Gerrit
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Re: Trackday preparation

Post by Gerrit » Wed May 23, 2018 7:20 pm

Don't forget to safety wire the gearbox drain plug.
"Mine is a long and sad tale", said the mouse.
"Indeed it is", said Alice, looking at the mouse's tail.

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JanBros
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Re: Trackday preparation

Post by JanBros » Wed May 23, 2018 8:18 pm

front 2.3 bar, rear 2.2 bar, that's what I always use, with any bike, track or street (but I only ride for fun, so my street-pace isn't much slower).
You know it's cold outside when you trip over dog shit instead of standing in it.

dirk
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Re: Trackday preparation

Post by dirk » Sun Jun 03, 2018 10:04 pm

hi Guys

Assen was great, and the engine held. :-)
it was very very hot with high humidity.
the engine was missing a few horses.
since most motorcycles had a lot more horsepower in the middle group, it was a little frustrating.
Assen is very fast, I always had to squeeze out the engine. :shock:
i was mostly alone and often overhauled.
so I got to know the track bad.
i discussed this with the instructor.
after some theory, the instructor drove with me and another driver alone.
three laps later he raised his thumb and waved me past. 8)
interestingly, many big bikes were not faster in the corners and I was even able to get closer. :mrgreen:
on the straight course, they were gone.
the Kawa was really fun.
the old chassis was enough for my skills.
however, I had to lower the tire pressure at the rear to 1.6 bar.

Here are a few pictures:
http://www.wegraceinfo.nl/fotoalbum/msc ... -may-2018/

Cheers
Dirk
KR-1S 1990
RG500 1987
RGV 250 1992
TZR250 (2MA) 1987

Gerrit
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Re: Trackday preparation

Post by Gerrit » Sun Jun 03, 2018 10:49 pm

The KR radiator is a bit marginal, Dirk, so you will lose less power if you fit a larger rad.

Thanks for the link to the pics, pity there were so many diesels on the track ruining the lines for you!
"Mine is a long and sad tale", said the mouse.
"Indeed it is", said Alice, looking at the mouse's tail.

mellorp
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Re: Trackday preparation

Post by mellorp » Mon Jun 04, 2018 11:33 am

dirk wrote:
Sun Jun 03, 2018 10:04 pm
hi Guys

Assen was great, and the engine held. :-)
it was very very hot with high humidity.
the engine was missing a few horses.
since most motorcycles had a lot more horsepower in the middle group, it was a little frustrating.
Assen is very fast, I always had to squeeze out the engine. :shock:
i was mostly alone and often overhauled.
so I got to know the track bad.
i discussed this with the instructor.
after some theory, the instructor drove with me and another driver alone.
three laps later he raised his thumb and waved me past. 8)
interestingly, many big bikes were not faster in the corners and I was even able to get closer. :mrgreen:
on the straight course, they were gone.
the Kawa was really fun.
the old chassis was enough for my skills.
however, I had to lower the tire pressure at the rear to 1.6 bar.

Here are a few pictures:
http://www.wegraceinfo.nl/fotoalbum/msc ... -may-2018/

Cheers
Dirk
It sounds like you had a great time. Best place for our little 2 strokes is thrashing them round a track. That's what they were designed for. When are you next at a circuit ?

dirk
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Re: Trackday preparation

Post by dirk » Mon Jun 04, 2018 12:58 pm

Yes, that was fun. :mrgreen:

i am at Cadwell Park on July 14th.
the event is from the Moto Morini Club.
friends of mine are driving Morinis.
but there are also other machines.
the last year was a very fast Scott Flying Squirrel 8) .
i will probably drive RGV250.
i did not ride that much and I'm curious how the thing works on the track.
KR-1S 1990
RG500 1987
RGV 250 1992
TZR250 (2MA) 1987

mellorp
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Re: Trackday preparation

Post by mellorp » Mon Jun 04, 2018 5:28 pm

If you are interested here are my trackdays


June 16th Saturday Cadwell Park
ClassicBike Track Days - up to 600 Inters Noisy Day

June 28th Thursday Donington Park 2T Big Bang the Main Event
No Limits - Lower Group (but that's just me) Noisy day

July 20-21st - Friday - Saturday Castle Combe
ClassicBike Track Days - up to 600 Inters Noisy Day

July 29th - Sunday RAF Shawbury
Shawbury Rider Weekend - Group C (novice/lower)

August 30th - Thursday Blyton Park - 2T Big Bang - The Aftershock
https://britishsuperbikeschool.com/ (School day) - We have a 2 Stroke group that isn't part of the school

September 19th - Wednesday - Silverstone GP circuit - 2T Big Bang the GP experience
No Limits - Lower Group (Gen bike day 102dB)

September 28th - Friday Cadwell Park - MSV Classic Bike day - Inters
October/November Last one at Oulton Park

dirk
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Location: Germany

Re: Trackday preparation

Post by dirk » Mon Jul 02, 2018 12:13 pm

I envy you.
unfortunately, it is too time-consuming and expensive to travel to the UK more often.
soon I also need a visa ? :lol:

i'm on the Isle of Man for the Manx Grand Prix in August .
maybe I'll do some laps in Jurby.
KR-1S 1990
RG500 1987
RGV 250 1992
TZR250 (2MA) 1987

Gerrit
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Re: Trackday preparation

Post by Gerrit » Tue Jul 03, 2018 12:10 am

Why would you need a visa for the UK, Dirk? I visited the UK regularly before the country joined the Common Market in 1973 and I didn't need a visa then. I see no reason why that would change.
"Mine is a long and sad tale", said the mouse.
"Indeed it is", said Alice, looking at the mouse's tail.

dirk
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Re: Trackday preparation

Post by dirk » Wed Jul 04, 2018 11:16 am

Gerrit wrote:
Tue Jul 03, 2018 12:10 am
Why would you need a visa for the UK, Dirk?
Brexit :mrgreen:

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