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Discussion in 'Thumpers' started by creeper, Feb 20, 2004.
been a while since i posted a picture in here
Haven't heard of such a thing. Detonation may not be detectable given the lively percussion of the LC4 when happy. I was told exhaust gas analyzer with NOx is needed to check for poor combustion.
Any emissions testing station has that. Maybe they could be used cheaply if we knew how to read the results.
What about a bore scope through the spark plug hole before and after a modification?
What I would like is a pressure sensor inside the cylinder. Building pressure is the whole point of the combustion engine, and overpressure is what wrecks them. It would give you a good sense of the engine's health including possible spikes from detonation.
Oh look, here is a spark plug with a pressure sensor.
Now you would need data processing and display of some sort.
Bore/Snake Camera works great..
You mention minor changes there; wouldn't even a different silencer/slip-on be part of a minor change that can cause mentioned issues (req retune)?
That spark plug is interesting.
Do you want a real-time (on the bike) dashboard display of data? Else: https://www.tfxengine.com/software.html
exhausting the cylinder is always good, its the filling that causes problems.
the first thing i do to all my bikes is open the exhaust with a quality slip on,, fueling usually needs to be done not because of the slip on but because the bikes are lean from the factory,,, i almost never change the intake side of things.
A dummy light on a simple automotive knock sensor would ease my mind, when I find myself riding fast in hot weather up a hill or something.
But it would be neat to get more detailed information to help decide what to repair (time for a top-end job?) or upgrade.
I was thinking the same, sensors can be found from car engines.
I was changing the front tire on my 2003 Adventure this evening and noticed the front wheel spacers and seals look pretty shot. The bearings seem OK.
I was looking on RMATV and noticed something odd, the EU parts diagram matches my bike (normal spacers right and left), the US diagram has a big funny spacer on the left which is out of production.
Do any of you guys have the "USA/AUS" setup?
i did not have that big spacer on my 03,,, wierd.
OK, I just wanted to make sure my bike is normal before ordering the parts, I figure if it's using some alternate setup then what I buy might not fit.
Does it have the speedometer drive there?
Mine does not, it uses the magnet pickup (Hall effect sensor?)
Sorry for late reply , I didn't check the forum from a while .
I don't have experience with the bushing from this eBay Seller .
I simply suggest you to try this bushing as earlier you was asking for any source or replacement for the discontinued lower shock bearing .
So ...this one is still available.
Maybe it is worth to ask directly the seller about longevity of that part ?
Could you be so kind and tell me what is better for you for off road riding FCR41MX or FCR39MX ?
Is the difference noticeable between two of them ? ( Low RPM Torque , fuel consumption , throttle response )
Would you choose FCR39MX over FCR41MX rather ?
I bought one for $30 but haven't installed it yet, my initial impression is underwhelming. The steel insert drops in the bronze with slop already, maybe I can get a couple years out of it then have someone make a nicer one up.
I do appreciate the link though, it's better than what's in it now and it's frustrating/depressing trying to find discontinued parts.
My FCR's are NonMX...not sure it makes much difference..between Non and MX. (I have an FCR41MX new in the box I am saving for a project LC4).
I like the 39 on the 640ADV as I don't ride it WFO much..riding it here in the SouthEast it works great,
the 41 on the SXC works perfectly for single track and WFO..a few times I have run it HARD WFO being a total Squidiot..conversely it worked great plodding along singletrack in Colorado..
As far as fuel mileage two of our riding friends have LC4's with BST40's and fueling is about the same or sometimes better with the FCR (much to their disbelief, some of it is riding style, and I have AutoClutches).
Throttle response is snappy..but then again, I have never had a "Proper BST", and never wanted one, and no stock exhaust either.
Thanks for responds guys !