Tyga performance.com sell special VHM cylinder heads for your bike which would allow you to tune your engine for more power.
They also sell HRC style reed valve rectifiers and carbon reed petals which might help.
You can buy aluminium parts which will reduce your bike's weight from Tyga too.
Many racers around the world remove their airbox completely and run 'open carbs'. Or they run the HRC airbox. Andy, who runs this website has made carbon fibre replicas of the HRC airbox (i have one), it may be worth asking him to make one for you? Just remember that any of these engine/airbox modifications may require a carburettor main jet change.
Your bike probably makes about 55-60 horsepower at the rear wheel.
The tyres you are using are very good but you can fit slicks to your magteks if you can get them in the right sizes.
Are there any photos or references on the internet of your race bike that we could look at?
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