640cc Big Bore Kit. 999 023 (Exchange Cylinder). All 604 Engine Variants.
May fit some 560 Engine Variants
Kit comprises of:
640 Nicasil Plated Cylinder RRP £913.95
100mm Piston Kit. Includes Rings, Circlips and Pin RRP £350.00
Base Gasket RRP £6.74
2x Medium O Rings RRP £7.78
1x Small O Ring RRP £2.83
If you wish to exchange your 604 cylinder the total price for the kit will be £600.00 Saving you £539.30 on the list price. The 640 kit will be shipped as soon as your cylinder has been received.
Discount still applies even if your cylinder has been seized. All cooling fins need to be intact to receive the discount of £539.30. Damaged fins can still be exchanged but a surcharge will be added.