250 cc Class Racing
Pro 250 Class
Carter 250 Class
Based around the existing 250cc Intermediate Solo Speedway class as per GCRs 19.8 of the MA Manual of Motorsport, the Carter 250cc Junior, Senior and Masters Classes that have developed, with the support of S.M.C.W.A, are based on 4 guiding principles:
1. Low Cost
2. Low Effort
4. Low Risk
3. High Enjoyment
The Junior and Senior classes provide a low cost, safe and effective transition for riders seeking to move from 125cc Junior Solo speedway to 350cc Junior Solo speedway and/or 500cc Senior Solo speedway, and similarly, new and inexperienced Senior riders wishing to move into the 500cc Senior Solo speedway class.
The 250cc Masters class (40 yrs and over) provides the opportunity for more mature aged riders, either existing or from the past, to continue or re-engage in the sport in a way that provides them with the enjoyment of solo speedway racing with significantly reduced risk of injury and substantially less cost and effort.
The GCRs for the 250cc Intermediate Solo Speedway class have been expanded in the areas of Engine & Carburettor, Frame & Parts and Fuel to support the guiding principles of the classes.
The key restrictions in terms of engine for the classes are:
• Up to 250cc;
• 4 stroke;
• Single cylinder;
• 2 values;
• Single spark; and
• Internal wet clutch.
As far as the chassis goes it must be a contemporary speedway frame made by a recognised manufacturere of speedway frames or a copy. This is to keep the integrity of speedway intact.
In terms of carburetion, no mechanical or electronic fuel injection is permitted, nor any form of forced injection. The maximum carburettors size is 30mm +/- 0.1mm, and can be in either in a round or flat slide configuration.
Particularly in respect of Senior and Masters, the class has attracted a significant amount of interest from new, existing and past riders. From just being a conception part way through the local 2010/11 season, by the end of the season 5 riders were competing on a regular basis, with another 5 in the process of acquiring machines.
Conservative estimate suggest that by the end of the 2011/12 local season we will have one division of Juniors, two divisions of Seniors and one division of Masters.
The secret of the classes’ success can be found in its underpinning principles.
Many people wanting to start riding 500cc solo speedway that have not had the benefit of learning the craft through participation in juniors solo speedway, find it a very daunting task to climb aboard of 500cc solo speedway machine and for that reason, many don’t. For those that do, many do not see the distance as the impact of injury, and the cost of maintaining and repairing machinery, becomes too much. The Carter 250cc class provides an alternative path to learning the fundamentals of solo speedway riding without the high risk of injury, and without the high price tag. The opportunity to use their rolling chassis if they decide to progress to a 500cc machine also supports the cost equation.
Many riders retire from solo speedway riding following long careers due to the ongoing level of commitment riding a 500cc solo machine demands in terms of cost and effort. Additionally, the risk of injury also starts to play a role, as many riders reach the stage in their life where continuity of income becomes significant more important, and the impact of an injury that prevents them from going to work or opening the doors of their business on Monday becomes too great. The Carter 250cc class allows riders in this situation to continue to participate in the sport that they love, and has been a major part of the lives for many years, in a way that allows the cost, effort and risk to be reduced to an acceptable and sustainable level. The opportunity for the re-use of existing machines also exists here.
For Juniors, it provides a very important transition from 125cc Junior Solo speedway to 350cc or 500cc Solo speedway. The transition from a 125cc solo machine to a 500cc machine, or even a 350cc machine, is dramatic and attracts some significant safety issues. Upon reaching 13 years, Junior riders can progress to the Carter 250cc class, which will provide them with considerably more power in a safe and usable form. This will allow them to expand their skills, before stepping onto a 350cc dedicated solo machine. This can all happen whilst maintain their ongoing 125cc racing. Most importantly, this can also be achieved at relatively low cost. Given that many parents find it difficult to support their child’s 125cc racing whilst at the same time fund the purchase and maintenance of a 350cc machine, the Carter 250cc class provides a sustainable alternative to their child’s solo speedway development. As previously mentioned, an investment in a Carter 250cc machine, allows for the rolling chassis to be re-use in a 350cc or 500cc engine configuration in the future, again allowing costs to be reduced.
I think the most important factor associated with the Carter 250cc classes is fun, fun and more fun!
Everyone that has climbs aboard a Carter 250cc machine has come in with a smile from ear to ear.
They are great fun to ride, but challenging at the same time. The perfect combination!
If you would like more information on the Carter 250cc class, and or a test ride on a Carter 250cc machine, please call Michael Carter (0429 378 921) or Dennis Carter (0407 728 941) of Carter Speedway Conversions.
SMCWA 250cc Solo Speedway Division Rules
The objective of this division is to provide competitive solo speedway racing at relatively lower cost and lower risk by utilising solo speedway frames and unmodified production engines. The focus is on improving rider ability as the principle means to achieve competitive advantage. Achieving competitive advantage through engine modification is discouraged. As a solo speedway division, the utilisation of classic or contemporary solo speedway frames is essential to maintaining the integrity of the division, and achieving its objective.
The SMCWA 250cc Solo Division shall be run under Rules 19.8 - 250cc Intermediate Speedway (2013 Manual of Motorcycle Sport) but with the following amendments/additions:
1. Rules 19.8.1 – Engines
Rule 126.96.36.199 shall be amended as follows:
4 stroke singles cylinder engine up to 250cc plus 2% tolerance, but not less than 200cc less 2% tolerance.
The following additional rules shall apply:
Rule 188.8.131.52 – 2 values maximum
Rule 184.108.40.206 – Fitted with 1 carburettor of 30mm maximum +/- 0.1 mm diameter
Rule 220.127.116.11 – 1 spark plug
Rule 18.104.22.168 – No mechanical or electronic fuel injection or forced induction permitted
Rule 22.214.171.124 – Internal Wet Clutch only
Rule 126.96.36.199 – Engines may be fitted in either an upright and lay down configuration
2. Rules 19.8.2 - Frames and Parts
The frame, being the front fork assembly, centre frame section and rear frame section, must have been produced by a recognised solo speedway frame manufacturer specific for solo speedway racing or be an equivalent reproduction both in design and appearance.
Rule 188.8.131.52 shall be amended as follows:
Rule 184.108.40.206 – shall also exempt machines used in this division
Rule 220.127.116.11 – Shall not apply
Rule 18.104.22.168 - shall apply
Rule 22.214.171.124 - shall not apply
Pro 250 Class
Coming soon is information for those that want to participate in a 250cc class that utilises a full solo speedway configuration, but with less horsepower than its 500cc big brother. This class will be based on the JAWA or GM 250cc speedway engine, which is becoming popular in Europe.