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Joined: Sun May 23, 2004 4:08 pm
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Location: newhall, CA
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2010 Technical Rule Changes
IKF Sprint
Ã’The following changes will be included in the IKF 2010 Competition, Regulations & Technical
Manual or published as Rule Updates 30 days prior to a requirement to comply.Ó
Section 105: Safety 2010 is the last year SA and M 2000 Snell helmets will be legal. The Class C helmet
is not recommended for adults. Video or recording equipment will not be allowed on any part of a driver including
their helmet. Wheel bleeders, tire relief valves or pop-offs will not be allowed.
Brake lines must be routed to prevent possible damage while the kart is in motion.
Section 601: Spec Fuel
Region 7 will allow Burris or Burris blend oils (you canÕt combine them) at 8oz/gallon (4oz for
Rotax). The Burris Blend is allowed for those days with temperatures that cause the oil to fall
out of suspension.
Section 275: TaG
275.5.2 The TaG Junior Class age has changed from 12 to 13 years of age.
Entries will only have to demonstrate all starter components are intact and properly connected.
They no longer have to turn over and/or start the engine.
The new 2009 Leopard is approved for 2010 competition. The engine will compete with a 15
pound penalty. The weight penalty will be reviewed within 90 days.
Section 620.50
HPV pipe: welded end caps have been postponed until 2011
HPV clutch: A new clutch (like that used on the IAME TaG) is now available. Both will be legal
in first 5 race series in Region 7. The new clutch will be required for the next 5 race series.
Section 717 World Formula 4 Cycle
717.11.3 Exhaust and Intake Lobe measurements now have a minimum spec of .303in to be used
in conjunction with the current maximum lift measurement of .3085in on the lobe profile chart.
717.16.4 The combustion chamber must now appear Òas castÓ instead of passing a no-go test
with the Sox #AT 341 tool.
Illegal Engines and/or Component Confiscation
Engines and/or components found to be illegal may be impounded at the discretion of the
Technical Director for later evaluation. The decision can be appealed in accordance with Section
508 procedures. If the component is found acceptable for competition, it will be returned to the
competitor at IKF expense. If the item is found to be illegal, it becomes property of the IKF.
Refusal to surrender an engine or component can result in a 12 month suspension from
Class Changes
Super Sportsman Senior with HPV-3 or RLV-3 pipe will run with 7.1/11.0-5 tires vs. the 6.0/
11.0-5Õs in the 2009 rules (moves from tire group II to group III).
New spec PRD Classes will be offered in Region 7 for Junior 2 through MasterÕs competitors. A
comprehensive set of weights and other standards will be published on the IKF Web Site. Most
noteworthy will be an engine claiming option patterned after other motor sport venues.
CR125 Spec Honda (SKUSA)
Effective January 1, 2010,
Only 1999 reed cage assemblies will be allowed, with no additional modification or components
such as reed stiffeners permitted. Aftermarket direct replacement reed petals will be allowed.
Only 1999 CR125 intake manifold (boot) may be used. While the use of the RS manifold was
originally allowed to facilitate the mounting of larger seats it has since become a routine
performance enhancement regardless of seat size. With the discontinuance of this part by Honda,
it has become increasingly difficult to find and therefore expensive. While we concede that in
some instances the fitment of larger seats might be slightly easier with the RS manifold it is by
no means impossible with the CR manifold. The SKUSA management team has been studying
this for a number of months and has numerous photos showing Large and XL seats in use with
the CR manifold.
We have been increasingly concerned with the number of complaints received from SKUSA
competitors about the decreased piston life that many are experiencing from detonation. While
we understand the quest for performance, the basis for the success of the Stock Honda class has
been its legendary reliability. Therefore, the option of modifying the static timing by removing
or machining the steel LH timing plate and/or grinding the aluminium stator base plate will
no longer be permitted. SKUSA will supply, at no cost, unmodified steel plates to those who
request them. Should demand require, we are prepared to supply SKUSA branded CNC
machined replacements with the same specifications as the stock steel plate.
ÒSquishÓ or deck height measurement through the spark plug hole will be a minimum of .050Ó
using .060Ó solder.
Only 1999 ignitions and components will be allowed.
Rotax (Gatorz Challenge of America)
The Mojo W2 Rain tire is now the spec rain tire for the Gatorz Challenge of the Americas and
Gatorz Karting Cup.
Full width rear bumpers are required in all classes.
The new clutch bearing with o-ring is required in all classes.

Wed Jan 06, 2010 11:39 pm
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