Main Bearings

LINEAWEAVER · Mar 4, 2007

Hi Faktor,
Sorry for the delay in my reply.

Changing the camshaft profile will provide a more linear delivery of power as opposed to the now concentrated hit around 4,000 rpm. Such will encourage you to ride where the bike is happy (ie around 6k).

Dale

PS
I recommend one disconnect the TPS if fuel economy is not of primary concern.

risky1 · Mar 4, 2007

I have also disconnected the TPS and noticed an immediate improvement in power delivery.

kez · Mar 4, 2007

LINEAWEAVER said:
Hi Faktor,
Sorry for the delay in my reply.

Changing the camshaft profile will provide a more linear delivery of power as opposed to the now concentrated hit around 4,000 rpm. Such will encourage you to ride where the bike is happy (ie around 6k).

Dale

PS
I recommend one disconnect the TPS if fuel economy is not of primary concern.

Dale Which Cam Is The OEM Cam Close To? I've Read On Here That The Later Spec Cam Is Close To Your One,Just Without The Nicer Profile.
LX1 Or LX2? And Which Is The Revvy One And The Lugging One?

LINEAWEAVER · Mar 4, 2007

kez said:
LINEAWEAVER said:

Hi Faktor,
Sorry for the delay in my reply.

Changing the camshaft profile will provide a more linear delivery of power as opposed to the now concentrated hit around 4,000 rpm. Such will encourage you to ride where the bike is happy (ie around 6k).

Dale

PS
I recommend one disconnect the TPS if fuel economy is not of primary concern.

Click to expand...

Dale Which Cam Is The OEM Cam Close To? I've Read On Here That The Later Spec Cam Is Close To Your One,Just Without The Nicer Profile.
LX1 Or LX2? And Which Is The Revvy One And The Lugging One?

All else remaining equal the LRX2 and the latest OE offering have near identical "Peak Power" potential. The OE profile has a much harder hit in the middle than the X2.

The LRX1 profile is race only and requires an open exhaust (ie No spark Arrestor).
Power is very strong 6K and above.

Hope this helps.

Dale

Taffy · Mar 4, 2007

kez

i have dale's LX2 cam and i changed out to a more open pipe but without emmitting too much noise and got rid of the slight hesitancy at low revs. the cam is excellent.

therefore it's the LX1 that would have a mild low drive but be excellent for the engine's durability. the top end hit would compliment the 650 completely i would imagine.

regards

Taffy

nsman · Mar 4, 2007

Has either the LX1 or LX2 cam been tested in a FE450e engine.100x57

Taffy · Mar 4, 2007

i think that that's like dissecting the atom.

often we get asked about the jetting for a 1996 501 and when you say "oh! about the same as the 600" people go apoplectic! same seems to go for the cam. the change it makes to my 400 is exactly the change it will make to the 550 and the 650 and did make to the 501 and the 600. the difference now is that the OEM cam has made the difference marginal on the later bikes '04+.

the same change in personality from larger inlets or exhaust valves will be found on all models. what i can tell you is that the cam is still the most restrictive article out of the traditional: valves, cam, carb, exhaust. until you unlock the cam, all the rest is small fry. the cam quickly followed by a tailpipe....

regards

Taffy

nsman · Mar 8, 2007

Having recently had a customer in the shop with a case of a failed crank bearing I have taken a more than casual intrest.
The NJ type cylinder roller bearing is very sensitive to being mounted correctly,the least bit askew and failure will eventually occur.Also the bearing,after it is successfully mounted,must be properly lubricated and must be turned as the rollers are introduced on the race.The least bit of interference in this fitting process between the roller and the race can easily scratch the race.This scratch may not be visable but will eventually end in bearing failure.
I think I understand how critical it is to have a set of perfectly alligned cases(hence the Lineaweaver shaft check).
You have to wonder if the factory workers are as carefull as they need to be when performing this instalation process,as it could be a challenge to be carefull to rotate the crank and assemble cases time after time...seems like a two man job!
The ball bearings that are often used to replace these NJ rollers may not be a superior bearing ,but I think that instalation of same may be better suited to assmbly line production and normal shop replacement.

Gazza · Mar 8, 2007

nsman, what model and year was the bike ?

nsman · Mar 8, 2007

05 fe450e approx 150 hrs

LINEAWEAVER · Mar 10, 2007

nsman said:
I think I understand how critical it is to have a set of perfectly alligned cases(hence the Lineaweaver shaft check).

Bruce,
You are cramping my style. Acknowledging that I may actually know something is dangerous. Save yourself man. Stop while you are ahead. lol

Dale

:wink:

Taffy · Mar 15, 2007

i forget their nmame but has anyone (dale!) tried the triaciacol (SP?????) type bearing? they offer advantages of rollers over ball race but are (it would appear) to be a half way house....

how does the 9-ball race compare to the 8 roller race bearing? still not good enough i trust...

regards

Taffy

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