Aprilia RS 125 Cylinder ReSleeve RS125 Rebore RS 125 Barrel Reconditioning

6 Июн 2015 | Author: | Комментарии к записи Aprilia RS 125 Cylinder ReSleeve RS125 Rebore RS 125 Barrel Reconditioning отключены
Aprilia RS 125

Aprilia RS125 Cylinder Service

Aprilia RS125 Re-Sleeving Service

Here you find information about Relining Aprilia RS 125 Cylinder

It’s no secret that of today’s high performance motorcycle- ATV’s- watercraft are using various coatings on cylinder bore- These include Nickasil- ceramic and chrome-

The main reason why use this process is primarily You see in the old day’s manufacturers had to cast an sleeve- machine it- then put it a mould and cast an aluminium around the sleeve- then the top and bottom face of the cylinder and up the ports then bore and Then the manufacturers had to supply with over size rings etc-

With a Coated cylinder have to cast the cylinder apply the coating direct to the there are no over sizes to make and keep in stock is much easier for the manufacture- It was to be better as it gave more for more power which is not the other myth is you can run a tighter to bore clearance but this is not true the 1988 YZ125 had a fitted cast iron and they switched to a coated in 1989 and they both had the piston to bore clearance-

But after all this the cylinder wears out

Many things cylinder and piston wear- entering the carburettor- pre-ignition- overheating- incorrect jetting- head gasket- poor oil- not bringing the engine up to before riding- Just to a few-

When your cylinder is worn or damaged it be re bored because the coating is thin- At this point you three options-

1- Re-coat the — See Our Cylinder Re-coating-

2- Buy a new cylinder -Way to expensive in cases-

3- Re-sleeve the cylinder-

we re-sleeve the cylinder- it’s with a custom chrome iron cylinder sleeve- The will maintain all factory-porting or in the case of a "race" ported it will retain the race If the cylinder fitted with a and wears out you simply have it and fit a new oversize piston- infact if you suffered a seize you can just it out- if you seize a coated it tends to pull the coating off the cylinder scrape-

From The Start to the Finish Process-

Your Aprilia cylinder barrel will with a serial number- is to help identify your and to make sure there is no mix up other customers cylinders- We then strip all bolts and valves -if it came with clean and bored out the cylinder to room for the new sleeve-

Making The Cylinder Sleeve

We Off With a Billet of Cast from which we will the new sleeve- we use a precision lathe to the sleeve which is a "Top type- The outer diameter is ground to — 0-15mm than the cylinder this is so the will be an interference fit- The of the sleeve is left 0-75mm the finished bore size-

By now the will be having its ports and transferred onto the new sleeve- is to ensure you get the same porting as

With the sleeve ported and it’s fitted into the we do this by heating up the cylinder in a made oven for 15 minutes- allows the cylinder to expand so we can in the new sleeve- it is then put under the and allowed to cool-

Once the ports are then hand in to the cylinder to give the smoothest flow- The cylinder is then blasted to give it that new look- We then machine the top of the cylinder to make sure it is flat to provide a good seal-

It’s then and honed to suit the piston will be used and cleaned before its ready to go back to you as as new-

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Price: (Ј123.60 Including VAT at 20%)

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