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PLEASE NOTE: Currently we are still only open for Telephone and Internet Orders.

At present suppliers are low or out of a lot of Stock, and some deliveries may take slightly longer than usual.

 *** New Macgregor Covering Films 2m Rolls Just £9.90 ***


Unfortunately this product is no longer available, please try searching for a similar product in case we have re-listed as a special combo or the product has changed.

O.S. OS Engine MAX 105HZ-R with Powerboost Pipe [L-OS18751]  


Identical to the regular 105HZ-R technically but supplied with the latest Powerboost 105 pipe. The pipe has been purpose designed to suit the 105HZ-R and will provide high power and torque across the RPM range without heat build up caused by restriction of gas flow. 



Displacement:17.17cc (
Bore:29.0mm (1.142")
Stroke:26.0mm (1.042")
Power Output:3.7PS @ 15,000 rpm
Practical RPM:2,000 - 16,500rpm