Provisional rules and as such are subject to change. Updated 25 February 2007.

For 2006 and onwards what used to be the KR Cup will become known as the Formula 250 Championship.

First a little bit of background to the F250 Championship. This started in 2001 as the KR Cup with the intention of encouraging people to keep racing their old Kwack KR1 and KR-1S two strokes. At the time these were seen as uncompetitive in the F400 class and by giving competitors something to race for, everybody likes to win something, it got numbers of these machines back out on the track. I think the best we had was eleven bikes in 2002 at Mallory. However, numbers dwindled as people moved on so the competition in 2004 was opened up to any two stroke 250. This injected a new lease of life in to the competition and in 2005 we were filling about half the F400 grid with two strokes, typically about 20 bikes competing.

A secondary aim for the competition was to raise the standard of the two strokes so that they could compete with the 400's. In 2004 we were still a bit behind but two strokes but did record wins at Cadwell and Oulton. In 2005 even though the two strokes have gone faster than before, the four strokes have gone even faster. Finally in 2006 the two strokes were matching the 400's with Alan Armour taking the F400 title after a set of thrilling races at teh final round at cadwell. Lets hope that for 2007 this success continues.

Competitors two worst race days will be dropped from the results. Note the emphasis on race days not races. This is to account for the fact that with work, family and other pressures on peoples times not everybody can make all events.

As in 2006 there will be no novice trophy instead there will be two divisions. Aim of Division 2 is to give the slower riders, both novice and experienced competitors, something to aspire to on their way up to Division 1. Riders that have finished at any circuit within 107% of the F250 Championship lap record time will be placed in Division 1. All other riders will be placed in Division 2. A list of lap records and the 107% time are listed below (these times will be amended as records are set). At the end of the season Prize money will be split on the basis of 80% to Division 1 and 20% to Division 2. Any rider can ask (to be confirmed in writing) to be moved in to Division 1. Once a rider has been entered into Division 1, for the season, they cannot go back to Division 2 (even if a lap record moves on and they drop out of the 107% criteria). A rider breaking into the 107% bracket at any time in their first four meetings of the season will be promoted to Division 1 automatically. After their first four meetings promotion to Division 1 will only occur at the riders request. There will be no separate point scoring for Division 2, points are scored for places on the basis of your finish in the overall competition. Complicated but it seemed to work ok in 2006.

The F250 Championship is open to any road based 250 two stroke. Rules are fairly simple. The bike must be a 250cc road based two stroke eligible for the Derby Phoenix F400 round, i.e. if the scruitineer says it is ok to race then you are in. Any model of 250 that started life as a road based machine is eligable this includes the gray imports such as RGV250 VJ23, NSR, all Yamaha TZR etc, but excludes pukka race bikes such as the TZ Yamaha and RS Honda. If you race a TZR or NSR - because they share so many parts with pukka GP bikes you must use the frame, crankcases and same size carbs as the road bike - hence TZ engine, carbs or frame are not allowed likewise for the RS Honda. But you can fit barrels ignition etc. Carb size on any bike shouldn't be larger than that fitted to a model in the range, e.g RGV 34mm, TZR 36mm, KR 35mm etc. The competition runs within the F400 class so if you want to score points in the F400 you need to be eligible for that (helps as it determines your grid position). Apart from that the only rule is that the capacity of the bike must not exceed 250cc (the only exception to this is bikes fitted with steel lined cylinders as standard, i.e. not the RGV,  KR1 etc which have plated cylinders as standard, where the manufacturer specified and supplied oversize pistons, e.g. KH250, RD250, TZR 2MA etc. Max capacity in this case will be determined by the manufacturers max oversize for these models with a maximum limit of 2.75mm oversize). You must run treaded tires no slicks or cut slicks. Full wets are allowed (current F400 rules) Grid positions will be allocated by the club. The format is at the first race of a meeting the first 3 rows by position in the F400 championship except for the first race of the first event of the year which is based on when the club receive your entry. Subsequent races at a meeting are gridded by your finish in the previous race - with your position on two day events carried over from the first day to the second day. For the first race the remaining rows after the first three are allocated by when the club received your entry (Note: all grid places will be based on your position within the F400 race and championship).

See how the rules have changed over the years 2005 rules or 2004 Rules or 2003 Rules or2001 Rules or 2002 Rules Return to Main Index

This document maintained by Mark Jordan.
Material Copyright © 2007 Mark Jordan