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LX1 or LX2

spanner

spanner

Joined Sep 2007
782 Posts | 291+
???
fs650e used on twisting road for a bit of fun, not sure which would be best, am thinking of a JBS big bore kit (693cc) when the piston needs replacing. Which would be a consideration.
I wont to move away from the concave standard cam and springs as it has worn the guides at 100 hours.
Any thoughts?

Cheers spanner.
 
spanner said:
fs650e used on twisting road for a bit of fun, not sure which would be best, am thinking of a JBS big bore kit (693cc) when the piston needs replacing. Which would be a consideration.
I wont to move away from the concave standard cam and springs as it has worn the guides at 100 hours.
Any thoughts?

Cheers spanner.
Click to expand...

Dale's X2 cam and dual valve spring kit.

I run both in my 00 501 and 04 550....

Regards,

Joe
 
RE: Re: LX1 or LX2

Hi, JoelUSA

Do you ride on the road?, I have the KTM dual spring kit

kzoo,

Check out some of the specialty cam grinders, I can get mine welded and reground for AU$160. to any profile.

I forgot to mention I am installing 37mm inlet and 32mm exhaust valves, + full Akrapovic

Cheers spanner
 
RE: Re: LX1 or LX2

i do both of the profiles mentioned. i do it on p/ex. PM me if you need any help.

regards

Taffy
 
spanner said:
fs650e used on twisting road for a bit of fun, not sure which would be best, am thinking of a JBS big bore kit (693cc) when the piston needs replacing. Which would be a consideration.
I wont to move away from the concave standard cam and springs as it has worn the guides at 100 hours.
Any thoughts?

Cheers spanner.
Click to expand...

Hi Spanner,

With it being the 650 I would think the X1 will be more suited, I run an X2 in my 550, wasn't really looking for performance just to get rid of that profile that made the engine sound like a bag of spanners which the X2 has done.
But I did notice the difference in torque once you get up around 4000rpm and from there upwards definitely an increase in power, very smooth and progressive.

Regards

Sparks.
 
RE: Re: LX1 or LX2

If you are ever going to run the bike with a restricted exhaust pipe - like the original enduro silencer which has a baffle in it - then you must use the lx2. The lx1, due to the overlap, will not run properly unless it has a straight through system.

I do not know how the cam would match the big bore kits.

Hope this helps,
Simon
 
RE: Re: LX1 or LX2

i found the LX2 needed straight through tailpipe on my 400 so i think you'll find that it holds true for both cams really...

regards

Taffy
 
Re: RE: Re: LX1 or LX2

Taffy said:
i found the LX2 needed straight through tailpipe on my 400 so i think you'll find that it holds true for both cams really...

regards

Taffy
Click to expand...

As I've said before, not on the 650. I've run and tested them both and on both an 01 and 03 650 engine :wink:

But it is always better to be on the cautious side.

Simon
 
Re: RE: Re: LX1 or LX2

spanner said:
kzoo,

Check out some of the specialty cam grinders, I can get mine welded and reground for AU$160. to any profile.
Click to expand...

Spanner,

Thanks for the suggestion, I wouldn't know where to find a cam grinder if my life depended on it, but I'll give it the 'ole college try.

One other thing though is I've got to run a sparky, and quite exhaust. The forestry service wouldn't have it any other way. If not having those is a restriction on running the non stocker cam, then it's a moot point, and I'll have to stick with the stocker.
 
Re: RE: Re: LX1 or LX2

spanner said:
Hi, JoelUSA

Do you ride on the road?, I have the KTM dual spring kit

kzoo,

Check out some of the specialty cam grinders, I can get mine welded and reground for AU$160. to any profile.

I forgot to mention I am installing 37mm inlet and 32mm exhaust valves, + full Akrapovic

Cheers spanner
Click to expand...

Not much road riding even though my 04 is plated. I mainly the California desert.

Send Dale Lineaweaver a PM for his pricing and delivery.

Regards,

Joe
 
RE: Re: RE: Re: LX1 or LX2

Has anyone tried the LX1, and can describe the results?

Cheers spanner
 
RE: Re: RE: Re: LX1 or LX2

i have run the top end cam - LX1 - and it just takes an extra 1-2000 revs and gives them at the top. you keep the standard cams midrange and it adds. if you get the lx2 it gives to the midrange and keeps the top end of the standard cam.

the only loss is if you swopped from the lx1 to the lx2 or vice versa.

regards

Taffy
 
RE: Re: RE: Re: LX1 or LX2

Thanks for the replies guys, I need to know is there any problem with the valves hitting the piston with the lx1 in the 05 650? The piston comes to the top of the cylinder in the 05.
I am not expecting to much power/ torque increase without increasing compression, that will have to come later.
 
RE: Re: RE: Re: LX1 or LX2

wrong spanner!

the piston may come to the top but it is concave and the bit in the middle is the same height as tyhe old piston -exactly. so what you've done is increased the compression by squeezing everything into the middle and creating a squish. 100% perfect.

the valves should miss the piston but i would never take it for granted. i couldn't do it. i did one last week and still forced myself to check for peice of mind!!!!

the actual compression WILL go up with the cam. the static compression of course won't. there is a posher name for it....

regards

Taffy
 
Yes that is right Taffy, the piston has a dish.
The outer edge, squish comes flush with the deck.
The static compression remains the same regardless of the cam that is used as it is the ratio of swept volume to combustion chamber size.
A longer duration cam will decrease compression as the inlet valve closes later therefore reducing the swept volume by that amount = less compression, except as i understand it, until the gas inertia at RPMs is enough to increase volumetric efficiency more than 100%. This is why long duration cams increase power a high revs at the expense of power at low revs.
Am just trying to find out whether I will have problems with clearance valve to piston I am suspecting not as the lode centre line angle of the lx1 is 106 degrees verses 115 degrees of the 08 cam?
Cheers spanner
 
Am just trying to find out whether I will have problems with clearance valve to piston I am suspecting not as the lode centre line angle of the lx1 is 106 degrees verses 115 degrees of the 08 cam?
Cheers spanner
 

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