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.: XT660.com - The #1 XT660 Resource :. ( https://www.xt660.com/index.php)
-   XT660X & XT660R General Discussions ( https://www.xt660.com/forumdisplay.php?f=121)
-   -   Big Bore and Gas Flowed Head Project ( https://www.xt660.com/showthread.php?t=14763)

richardsracingmad 01-09-10 20:45
Quote:
Originally Posted by dazmatic (Post 137392)
Ah well, sorry to hear bud!

But Kudos though to wanting to mod your bike up like that!

Very much wish I could do the same.

Should be a very nice machine once you've finished with it all, very envious here! :applause:
Its ALREADY a wonderful bike....I just like modding!!....i hope i don't end up with an animal,.. just trying to keep it a quick, but driveable,useable, reliable bike ! Tricky balance!

Simon-c 01-09-10 22:29
Spoke to a guy with a Raptor 700 tonight, seems you can get a turbo kit for them.

richardsracingmad 01-09-10 22:39
Yep I know, incredible isn't it?...not for me tho' Simon.....!!

I've been watcing some Supermono racing on Youtube, where they use the XT engine, amongst others....those race bikes, in tiny 125cc chassis size, are amazing. And what a noise!!

dazmatic 01-09-10 23:05
A mate at work...

Well, a colleague should I say, has an Aprillia SXV 450 I think and although it makes 60hp and is more suited to racing and looks fantastic, they're a terrible bike for anything BUT racing.

I would hate to ride one on the road, there is virtually NO fuel tank, the seat could split a hair in half and he's had nothing but problems with it with a near new bike.

If you want a road going supermoto though the XT is win!

It's comfortable with a decent tank size and can cruise along listening to the burble of the twin cans at 70 quite happily.

richardsracingmad 02-09-10 09:17
Well I have to decide what to do about the Camshaft...

The higher performance ones do worry me a bit, but it hasn't seemed to worry the engine builder.
So, I have to get my order together for the USA, and have decided to go for a HDD5050 Camshaft to try .
If I don't get on with it, it should be easy to sell anyway (maybe to an Aussie!).
We will do the rocker mod so that we can swap cams easily, and the valves and springs are being uprated anyway...
I think I will have to try a custom profile as well.
The piston should be arriving shortly, and then I can get the barrel off for boring/plating.

Kev 02-09-10 11:33
Quote:
Originally Posted by richardsracingmad (Post 137438)
Well I have to decide what to do about the Camshaft...

The higher performance ones do worry me a bit, but it hasn't seemed to worry the engine builder.
So, I have to get my order together for the USA, and have decided to go for a HDD5050 Camshaft to try .
If I don't get on with it, it should be easy to sell anyway (maybe to an Aussie!).
We will do the rocker mod so that we can swap cams easily, and the valves and springs are being uprated anyway...
I think I will have to try a custom profile as well.
The piston should be arriving shortly, and then I can get the barrel off for boring/plating.
Don't forget bigger inlet valves with the 5050, you might as well get the most out of the cam. You will also need a +2/+3mm throttle body. Don't worry I know of a Ozzy watching this build closely. You will also need to move the rev limiter to work with this cam.

richardsracingmad 02-09-10 11:41
We have a spec, its just the camshaft undecision on my behalf..

+2 inlet valves
Std Exhaust valves
And a throttle body........


Man with little fingers to move rev limiter, hopefully.

richardsracingmad 02-09-10 13:59
I hope my bike sounds like this......
 
http://www.youtube.com/watch?v=hOZm9Osiu0k

i think it will be nearer this tho....(this really is basically the same engine in yours and my bike....)

http://www.youtube.com/watch?v=223ZrACY0FQ

..those Tourance tyres working really hard on a XTR......

richardsracingmad 02-09-10 17:01
And I am after this level of care for my new engine...
 
http://i933.photobucket.com/albums/a...g?t=1283439624

richardsracingmad 02-09-10 19:24
a nice looking engine...
 
http://i933.photobucket.com/albums/a...mad/engine.jpg


They are getting 68-70hp out of a 686cc on carbs.....thats with a lumpy cam.....


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