Description

Hayabusa Gen 1 Camshaft Pair Regrind Inlet:248deg/9.30mm lift, Exhaust:234deg/8.20mm lift

CM-BUSA-01R

The first upgrade to the standard Hayabusa cams involves regrinding the original cams to new profiles, for this upgrade the customer’s cams are required.

These are a nice upgrade over the standard cams, giving an increase in torque & horsepower. Expected performance gains 10+BHP*
(*this depends on the engine build, more or less can be gained depending on total spec of your engine)

This is the largest profile that is achievable as a regrind using standard cams. It still makes use of the standard springs & caps, which are extremely good.

To achieve the best performance from these camshafts, we recommend between 12:1 to 13:1 compression ratio. You will mostly likely need to modify the pistons if you are using standard pistons to ensure there is sufficient valve to piston clearance. You may not be able to reach the optimum compression with the stock piston but you will still get good performance gains even if using the standard pistons.

We only recommend the use of our cam profiles with vernier cam pulleys so you can optimise the cam timing and during the build, you must check valve to piston clearance and modify the pistons or replace with a competition piston if extra clearance is required. We recommend a minimum of 40-60thou (1-1.5mm).

If you are attempting to increase the compression ratio, the Hayabusa as standard normally has a large squish sometimes in excess of 40thou (1mm), we recommend a minimum of 30thou but this will obviously reduce your valve to piston clearance so care will need to be taken and careful measuring should be taken by the engine builder.

Please note

In order to grind the CM-BUSA-01R profiles, the Customer must provide a pair of standard Hayabusa Gen 1 cams. We sometimes have in stock Hayabusa cams, please see related products below.

Please see instruction sheets for information regarding the camshafts, their installation & running in.