Refurbishing and Re-chroming of motorbike forks
All fork stanchions are pre-checked for straightness and will be straightened if required prior to work being carried out. All work carries a 12 month guarantee. Please ring to arrange collection/delivery. All major Credit / Debit cards accepted.
Prices with discounts for multiple items.
We can refurbish/re-chrome:
• Fork stanchions (conventional)
• Fork stanchions (upside down)
• Shock Rods
Prices range from £80 for a single stanchion to £145 for a pair.
Fork Stanchions (Conventional)
One-off ………………………….. £80.00
Pair ……………………………….. £145.00
One-off ………………………….. £125.00
Pair ……………………………….. £220.00
Fork Stanchions (Upside Down)
One-off ………………………….. £90.00
Pair ……………………………….. £165.00
One-off ………………………….. £140.00
Pair ……………………………….. £240.00
Hints & Tips
Motorcycle forks connect a motorcycle’s front wheel to the frame. The fork tubes house the front suspension assembly and compress and extend to adjust for inconsistencies in the road, allowing the front tyre to maintain contact with the road for better handling and braking and cushion the rider from the up-and-down movement of the wheel on the road surface. Part of the motorcycle’s weight is suspended on the forks, so the tubes act as a shock absorber via springs and oil.
The fork adjustment is a screw at the top of the fork which pressurises the fork spring. Turning the screw increases or reduces the pre-load on the spring, letting the rider adjust the amount of negative fork travel. This has no effect, however, on the spring rate except if the springs have a progressive rate, in which case the ‘softer’ part is used up first when increasing pre-load, letting them appear ‘stiffer’.
Some forks also allow damping adjustment. This is typically done through a screw-type adjuster in the top of the fork. The adjuster is connected to a rod that, when rotated, selects differently-sized orifices that control the flow of fork oil. The larger the orifice, the more freely the oil flows, and the less damped is the fork.
Cartridge forks provide better performance by having regressive damping. Cartridges in the forks contain damping orifices that are covered by springs. With small forces on the fork, the springs resist the flow of oil and the damping is higher. With higher forces on the fork the springs are forced back allowing the flow of more oil and less damping. Thus the fork is stiffer when responding to small bumps in the road, but will soften as larger bumps are encountered.
The fork tubes are held together by a part called a triple clamp. There is an upper and a lower triple clamp to stabilise the forks; together these constitute the triple tree. At the bottom of the forks there is a special slot to hold the axle. The front wheel fits between the two forks, the axle harnessing the lower ends of the forks together.
The Process – Fork Reconditioning
1. Full inspection, measurement and recording, also checking for straightness and then straighten if necessary. (Heavy braking and flexing can create small bending that is easily repairable).
2. Pre-grind on one of our centreless grinding machines to remove old chrome and any pitting / damage. It is not normally necessary to remove more than 0.030”.
3. Prepare for hard-chrome plating. This will include masking of all internal bushes / valves with special tape and wax.
4. The forks are then hard chrome electroplated (slightly oversize). This process can take up to 24 hours in the hard chrome vats dependant on the deposit required.
5. During plating the forks are regularly inspected and measured to ensure that there is sufficient thickness of hard chrome to enable finish grinding back to the original specification.
6. When electroplating is complete, the forks are prepared for finish grinding.
7. The forks are then finish ground to an accuracy of 0.005”.
8. Inspection, measurement and recording is carried out at all stages of finish grinding.
9. The forks are then linished and polished to produce a perfect finish. This process aids the seals “bed in process” and extends life.
10. The final inspection and recording is then carried out prior to despatch and secure packaging. The forks can then be collected or sent back to the customer by secure carrier.
Collection & Deliveries
Customer Collection & Delivery.
We offer a complete service which includes delivery back to the client. To arrange please contact us with your name and address including the postcode (this can be a private or place of work address), a contact telephone number and details of payment. We accept most major credit and debit cards.
For overseas customers please call for more information. We have many customers from around the world.
Packaging Your Forks For Shipment To Us
We recommend you send your forks taped together in a strong cardboard tube if possible, alternatively they can be wrapped in bubble wrap, cardboard or even carpet, paying particular attention to the ends so as not to allow them to slip out. Please address them to us and it is very important that you enclose your details including a contact phone number.
Testing Your Forks
There are a few simple tests you can do to determine whether your forks are in good condition. By pulling the front brake lever and depressing the forks as far as they go and then, whilst holding the brake lever in, release your weight from the forks you can determine their state of play. Forks that are well maintained and in good order will return evenly to their upright position without yo-yoing. They should also not spring up too quickly or slowly.
Damaged and underperforming forks can be dangerous and will cause an MOT failure. The conditions of the MOT test require that:
· There should be no oil visible on the fork tube or leaking down the slider around the fork oil seal areas
· The forks must be adequately dampened
· Fork assembly component must not be loose, cracked, or excessively bent, misaligned or corroded
· Seals must not be compromised
· Forks must not demonstrate excessive stiffness in their movement
If any of the above symptoms are evident your motorbike could fail a MOT test.