CYLINDER PORTING
All cylinder porting is designed to suit application be it road race or moto x for example and to suit customer/riders needs/styles also by the limitations set by the manufactures eg piston rings gearbox ratios crank and bearings.
Porting work Prices start from as little as £50 for mild road porting on single cylinders
Just a couple of Samples, 1st one Honda RS125
Puch Maxi Before Porting and Machining
Puch Maxi after
These Modifications more than Doubled the hp
1976 KTM 250 Grass track porting
BMB 125 Kart tuning and rebuilding
All cylinder porting is designed to suit application be it road race or moto x for example and to suit customer/riders needs/styles also by the limitations set by the manufactures eg piston rings gearbox ratios crank and bearings.
ENGINE REBUILDS
Rebuild prices start at £70 for a single cylinder two stroke plus parts.
CYLINDER HEAD MACHINING SERVICES
Cylinder heads are designed and setup for specific fuel types i.e. Avgas unleaded etc giving optimum squish area clearance and performance without detonation
Prices start at £30 for single cylinders
CRANKCASE FLOWING MATCHING AND EPOXY FILLING IN SOME CASES
CARB BORING AND MODIFICATIONS 
REBORES
CATERING FOR 2 STROKE AND 4 STROKE
Rebores are carried out using an SPS MINI BAR specially designed for motorcycle cylinders which caters for 35mm-87mm bore sizes bores are then precision honed to give the correct clearances using delapena hones also ports are radiused and exhaust briges relived where necessary then the cylinder are thoroughly cleaned ready for fitting to your engine.
PRICES PER CYLINDER £29 including honing and port radiusing
exhaust bridge reliving +£5
and no additional charge if you want to supply your own pistons
Now with the mark 5&8 Mini bars we can re bore cylinders from 35mm to 100mm
Yamaha fs1e rebored and honed ports radiused
Yamaha Rd 250 Finished product
750 Triumph
Big Bore Kits
This is a Suzuki Ap 50 bored out from 41mm to 45mm with a medium to fast road porting job
CRANK REBUILDS
This is a modified 43mm stroker crank from another moped ready to fit a Yamaha fs1e taking the standard 39.7mm stroke to 43mm
Below standard fs1e cranks
We specialize in performance racing, road and classic press together cranks 2t & 4t below prices are for 2t cranks for four stroke crank rebuilds please call for pricing.