I need the Thunderbike rules ASAP

[Bad_Matt]

I am having a big time issue getting onto the CCS/FUSA website.  I also cannot put my hands on my 2004 rule book.  Would someone be able to e-mail the pdf file rule book for last year?  I have a friend that is trying to build up a bike for 2005 and wants to make sure he is legal.

thanks,

[ScubaSteve]

Rumor has it some things may change for next year!! What bike is he planning on building i may be able to give you some info if its a SV

[Woofentino Pugrossi]

From the 04 rules

-------------------------------------------------
6.5 THUNDERBIKE - Thunderbike machines, except single cylinder machines, are based upon production models, sold by
manufacturers and their dealers in North America for street use. Proof of compliance rests with the competitor entering the
motorcycle. Single cylinder machines are exempt from production and street use requirements. Single cylinder 2 stroke GP
road race machines are not allowed in this class. All machines must have unaltered VIN numbers.
NOTE: Ducati 748 Series machines are excluded from this class.
6.5.1 Production machines not sold by manufacturers and their dealers for street use in North America via normal
commercial channels may be approved on an individual basis. FORMULA USA will maintain a list of non-standard
approved models and that list will be available at each event from the Race Director/Referee.
6.5.2. All machines must meet the equipment standards of Section 5, as well as the following:
A. Frame, cylinder head(s) and engine cases must be from the same production model motorcycle. Single cylinder
motorcycles may use any frame and engine.
B. The frame must be as originally supplied by the manufacturer on the approved model. Strengthening gussets or
tubes may be added. Only brackets or tubes not supporting suspension, engine, or drive line components may be
removed. Swing arms may be modified or replaced and rear shocks may be replaced or relocated. Single cylinder
motorcycles are excluded from this restriction.
C. Reducing engine size of machines from stock displacement to meet Thunder class displacement limits is not
allowed.
D. Fairings that meet the requirements of Section 5 may be used.
E. Liquid cooling is not allowed unless original equipment on the model being used.
F. Original type of induction system must be retained. If a machine originally was sold with fuel injection, then it must
remain fuel injected. If the machine originally came with carburetors, then it must use carburetors, however they
need not be the original type or size.
6.5.3- CCS Thunderbike Class displacement limits are absolute and are set as follows:
THUNDERBIKE (Amateur and Expert)
Single cylinder, Unlimited displacement
Two stroke, Unlimited displacement
Twin cylinder, air cooled, Unlimited displacement
Twin cylinder, liquid cooled, 3 or less valves per cylinder, Unlimited displacement
Twin cylinder, liquid cooled, 4 valve per cylinder, non-desmodromic valves, up to 800cc
Three cylinder, non-fuel injected, up to 1200cc
Four cylinder, air-cooled, up to 1200cc
Four cylinder, liquid cooled, 1990 to 1992 model year, up to 650cc
Four cylinder, liquid cooled (oil or water), pre-1990 model year, up to 860cc
All air-cooled, 2-valve, unlimited displacement

[eh427]

Rumor has it some things may change for next year!! What bike is he planning on building i may be able to give you some info if its a SV

Does anyone know what kind of rules changes they are thinking about?

[ecumike]

you could try emailing & calling them. :)

[Bad_Matt]

Thanks-  This is the same for FUSA T-Bike right?  What is the power to weight ratio?

[Woofentino Pugrossi]

Thanks-  This is the same for FUSA T-Bike right?  What is the power to weight ratio?

No power to weight ratio in CCS T-bike (at least up to this year). FUSA uses the power to weight ratio.

[Eric Kelcher]

There is another thread talking about the PROPOSED changes to Thunderbike that Kevin Elliott has responded to.

To paraphrase
power to weight may go rider and machine to hp what the ratio will be I am unsure my guess average rider 180#s with gear. last year power to weight had been 4#s per Hp as measured on a Factory Dyno for twins triples and 4.5 for 4 cylinders. (I think those numbers are correct I did not help with Dyno much this year).

Eliminate 4cylinder machines from FUSA thundrbike CCS thunderbike would still allow them.

[H-man]

For what it may be worth, here're the current Formula USA Thunderbike rules:

6.11 THUNDERBIKE - Thunderbike machines, except single cylinder machines, are based upon production models, sold by
manufacturers and their dealers in North America for street use. Proof of compliance rests with the competitor entering the
motorcycle. Single cylinder machines are exempt from production and street use requirements. Single cylinder 2 stroke GP
road race machines are not allowed in this class. All machines must have unaltered VIN numbers.
NOTE: Ducati 748 Series machines are excluded from this class.
6.11.1 Production machines not sold by manufacturers and their dealers for street use in North America via normal
commercial channels may be approved on an individual basis. FORMULA USA will maintain a list of non-standard
approved models and that list will be available at each event from the Race Director/Referee.
6.11.2. All machines must meet the equipment standards of Section 5, as well as the following:
A. Frame, cylinder head(s), and engine cases must be from the same production model motorcycle. Single
cylinder motorcycles may use any frame and engine.
B. The frame must be as originally supplied by the manufacturer on the approved model. Strengthening gussets or
tubes may be added. Only brackets or tubes not supporting suspension, engine, or drive line components may be
removed. Swing arms may be modified or replaced and rear shocks may be replaced or relocated. Single cylinder
motorcycles are excluded from this restriction.
C. Reducing engine size of machines from stock displacement to meet Thunderbike class displacement limits is not
allowed.
D. Fairings that meet the requirements of Section 5 may be used.
E. Liquid cooling is not allowed unless original equipment on the model being used.
F. Original type of induction system must be retained. If a machine originally was sold with fuel injection, then it must
remain fuel injected. If the machine originally came with carburetors, then it must use carburetors, however they
need not be the original type or size.
G. Thunderbike machines are required to meet horsepower to weight limit of 3.8 lbs per horsepower . (Tested weight
divided by tested horsepower during post race inspection.)
1. Penalties for failure to meet this requirement will follow Sportbike parameters.
6.11.3- Thunderbike Class displacement limits are absolute and are set as follows:
THUNDERBIKE
Single cylinder, Unlimited displacement
Two stroke, Unlimited displacement
Twin cylinder, air cooled, Unlimited displacement
Twin cylinder, liquid cooled, 3 or less valves per cylinder, Unlimited displacement
Twin cylinder, liquid cooled, 4 valve per cylinder, non-desmodromic valves, up to 800cc
Three cylinder, non-fuel injected, up to 1200cc
Four cylinder, air-cooled, up to 1200cc
Four cylinder, liquid cooled, 1990 to 1992 model year, up to 650cc
Four cylinder, liquid cooled (oil or water), pre-1990 model year, up to 860cc
All air-cooled, 2-valve, unlimited displacement

[ScubaSteve]

Those are the changes i heard also!! I really hope they add the rider weight also!!