yamaha's

[Toffy]

It 's just a matter of the compressionrate you achieve after skimming...
The higher the compression, the higher the required octane number to avoid detonation.

Detonation is when the fuelmixture pre-ignites before the piston reaches scheduled spark ignition. This means that a powerful explosion is trying to expand a cylinder chamber that is shrinking in size, attempting to reverse the direction of the piston and the engine.

A fuels Octane rating is a measure of its resistance to spontaneous combustion, or detonation. The greater the Octane the greater the resistance. In the UK, standard Unleaded fuel is rated at 95 Ron (Research Octane Number),

High octane fuel is also more expensive, so your fuelbill will rise....

Grts, T

[Cookee]

Originally Posted by bigboy

Cookee I said that he will need 98 which is regular fuel. But if he's going on holiday to fe Kroatia it may be harder to get 98 while it's no problem to get 95! Something to consider...

What Toffy said.