Okay guys, I just got done striking up a deal with Wiseco to build custom pistons for the XT 660/650 Pegaso..... I need to buy an initial order of 50 pcs, that I can divide between a new Raptor line and the bike line-up. I am interested in selling some for cost, which is just under $150 US. I will have a choice of 11:1 and 12.5:1 in 100 and 102mm bore sizes. With the economy so rough, I need help with the initial order.

The features that will be added are explicitly designed for maximum durability and power production without marketing gimmicks that run the price up.

The main improvements over stock(and many aftermarket) are;
1) True compression ratio increases. The piston actually makes it's advertised compression
2) 2618 piston material that is far stronger than the standard 4032
3) Corrected deck height for knock resistance and higher combustion efficiency
4) Ample valve reliefs to handle future upgrades to the head or cam
5) Centered piston pin for reduced cylinder wall stresses and friction

Of course they will be complete with pin, rings, wire locks and retail packaged.

Let me know if any of you guys are interested.

Kenny

Gentlemen this is the chance you've all been waiting for, Kenny here is working hard to strike a good deal for us therefore it will be only fair that you invest in one of these pistons which will make a significant improvement to your engine.

Let's see those orders rolling in please.

Thanks

Some questions please Kenny.

1. I am looking for maximum torque at low/mid range for my off-road mountain riding. Would I be right in thinking the 100mm 11:1 would be better for this purpose?

2. Would this be the best combination for torque with my +3mm throttle body?

3. Is it a straight drop-in? i.e. is it reversible?

4. What time-scale are we looking at?

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XT Modifications - XT Supporter's scheme

kenny with the piston set you are saying is it complete and we dont need anything else to put it in the engine and work properly??if its a complete set and you can ship it to greece i am interested!

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XT660X STOCK

Hi Kenny,

Looking forward to your answering the questions above.

I am very interested.

Sounds very exciting!

Considering I have 2 left hands when it comes to mechanics. Does anybody know what I could be expecting to pay to have these fitted in the UK (London) and what other engine work would need doing for this to work?

Thanks guys,
This is a straight drop-in and is easily reversible. You will probably want a new head gasket, which the Yamaha factory piece is the best AND cheapest. It is also re-usable for the adventurous types. Higher compression by itself is worth more power and torque. 11:1 is only 1 point higher than what you have, but that 1 point combined with the tighter squish area work together to make a more efficient, and responsive engine. They are good for 2 hp or so and a similar gain in torque. The 12.5:1 is worth another 1-1 1/2 hp over the 11:1, but requires higher octane gas. Yes, I will ship them anywhere(even Greece). I decided to build these pistons knowing that I will never sell one in this country. I am waiting to find out a positive lead time for production. Hopefully we will be looking at 2 weeks. The trick is gonna be collecting orders and putting it all together. I will talk with Wiseco tomorrow to get a definite.

Sounds good to me Kenny - put me down for a 100mm 11:1 and I shall pay you up front if you wish - I'm guessing $190 with carriage or let me know. I know you are honest and trustworthy so anyone can order with confidence from you.

David

__________________
My Mods | TLC | A good spannering | Kev's brilliant Mods & advice via XTSupporters - Best �10 ever spent.Lucid Puppy && SeaMonkey - Wubi - - Boinc - electric sheep

XT Modifications - XT Supporter's scheme

Hi Kenny,

You can put me down for one - not sure which compression ratio though. Can one run the 12.5:1 on high octaine (98) pump gas or are we talking race fuel here? If I can get away with high octaine pump gas I'm in for the 12.5:1

Kenny, I suggest you post the same notice here on the Aprilia Pegaso Forum:

http://www.apriliaforum.com/forums/index.php

Not nearly as many modders / tech heads over there but you may get a few orders closer to the 50 you need.