The KTM LC4 Reliability research thread

[tHEtREV]

1. Bike: 640 ADV
2. Year:02
3. Bought used or new: used in 08?
4. Current mileage: 56000 Klm
5. Modifications done: 9l rear tank, 92 600exc seat and rear plastics, subframe support (also holds rear tank). I think thats all.
6. Mechanical work done: None that I know of.
7. Upgrades done:nil
8. Current tires on the bike:Think I'm trying a Trail wing on the rear, and a Pirelli scorpion on the front.
9. Percentage of road versus dirt use:50/50, it's main use now is out back touring.
10. Would you buy another one?: I did.
11. Did you replace the main shaft bearing (if applicable): not yet, but I will if I do the planed rebuild (just for preventative purposes, it's not on it's last legs, I hope).
12. Pic of the bike if available:








my old 92 600..

[hg102]

1. Bike: 640 Adventure
2. Year: 2002
3. Bought used or new: used 10,500
4. Current mileage: 14,000
5. Modifications done: EXC exhaust, 39mm keihin, led running lights, rewired all lighting circuits w relays and heavier wire, soft lugage w racks
6. Mechanical work done: yes
7. Upgrades, Rich's custom seat,foot pegs, carbon fiber tank gards and garmin 276c.
8. Current tires on the bike: dunlop 606s
9. Percentage of road versus dirt use: 65 road, 35 dirt
11. Did you replace the main shaft bearing (if applicable): yes, failed at 12,500 but shut down before other damage incured
12. Pic of the bike if available:

I also have a 99 640Adventure. I really enjoy riding and working on these excellent bikes. Best of all they don't have computers to create problems.

[izom]

...i have now 20tkms on the clock!-

should i open the head and check the valves or not??

or do you think it makes another 10tkms??

and PLEASE can the new 640 adv.riders update this tread with their statistics!?(i know there are many new here!)

greetz peter

[erdsh]

1. Bike: 640 Adventure
2. Year: 2001
3. Bought used or new: Used
4. Current mileage: about 70,000 km
5. Modifications done: build the roadbook holder/ GPS mount, LEDs replaced the original lights.
6. Mechanical work done: Leaky countershaft seal, welded broken rear subframe. Electric wires renew. Electric connectors replaced. balancer shft bearings replaced. the Clutch bearing replaced. Clutch at arount 50,000. Carb rebuild. Cables replaced. A lot of electric work done. Rebiuld Fuel Pump. oil leaks are all over.
7. Upgrades done: Lowered. (this is downgrade)
8. Current tires on the bike: Running the Karoo everyday. use the Kenda carlsbad for long travels and desert races.
9. Percentage of road versus dirt use: 30/70. Nothing too technical. Mostly desert or rocky trails with a little singles.Use it as everyday commuter.
10. Would you buy another one?: It's amazing, no doubt, but I would like a smaller bike like the 300 or the new 350 4 strok for technical riding.
11. Did you replace the main shaft bearing (if applicable): not yet.
12. Pic of the bike if available:

[erdsh]

another pic of the bike

[Happe]

1. Bike: 640 Adventure
2. Year:1998
3. Bought used or new: used 101048Km
4. Current mileage: 101600
5. Modifications done: DAM exhaust, 39mm keihin, led tail light, CEV Switches, Handlebar risers
6. Mechanical work done: yes, 95000Km Piston cracked, known issue with the cast pistons, 101048Km Crank Bearing seized. New 2004 Engine with hydraulic Clutch fitted. Was lying around in the Garage
Adventure Story
7. Upgrades, Rally Seat, carbon fiber tank gards and garmin zumo 660, Paintjob
8. Current tires on the bike: Karoos
9. Percentage of road versus dirt use: 80 road, 20 dirt
10. Would you buy another one?: I have three, isn't that enough?
11. Did you replace the main shaft bearing (if applicable): No in old engine, new one has the uprated one
12. Pic of the bike if available:


cu
Stefan

[Happe]

1. Bike: 660 Rally
2. Year:1998
3. Bought used or new: used 18000Km (including 1x Dakar in 1999)
4. Current mileage: 40000
5. Modifications done: 2004SMC high Flow Head and cylinder & Ingnition fitted, 41mm keihin, led tail light, Stenhouse Racing SteeringDamper mount with Handlebar risers, Scotts Steering Damper, Selfmade wiring
6. Mechanical work done: yes, 39000Km Piston tired, shim of Rocker schaft failed and rocker seized, New Piston and Valve drive fitted. Rally Overhaull
7. Upgrades, It is a Rally Bike therefore perfect
8. Current tires on the bike: Karoos
9. Percentage of road versus dirt use: 50 road, 50 dirt
10. Would you buy another one?: I have three, isn't that enough?
11. Did you replace the main shaft bearing (if applicable): Yes, first job done just in case
12. Pic of the bike if available:


cu
Stefan

[pcvance]

1. 640-E
2. 2000' the last year with WP 50MM extreem forks
3. bought used w/11000 miles
4. current mileage 19725 miles
5. bst-40 mods/KTM air box side cover and KTM exhaust/bars & risers/rear rack
6. only routine matinance so far...
7. skid plate, Cycra handguards, Wolfman tankbag and side stand
8. D606 front and rear
9. 40 slab/60 dirt
10. yep! great bikes
11. nope... not yet
12. here it is...

[clintnz]

Originally Posted by overlandr

Some threads must not die.

Indeed. I just updated my original post & added a link to my 95K km rebuild thread.

Peter: both my sets of cam bearings have lasted over 45K km, but many have had theirs fail at less. I'm planning to replace the current set when they have done 40K km.

Cheers
Clint

[Elefant 900 Rad]

1. Bike: 640 LC4 Dualsport
2. Year: 2000
3. Bought used or new: New
4. Current mileage: 10,000+...not sure, speedo-odo broke long time ago (I ride my 950 a lot more).
5. Modifications done: Not much, just accessories.
6. Mechanical work done: Crank Bearing (my fault, air filter did not seat properly, allowed dirt into engine), other...typical maintenance.
7. Upgrades done: Modified seat, rear tail rack, modified rear turn signals, Trailtech Computer.
8. Current tires on the bike: Dunlop D606 front & rear
9. Percentage of road versus dirt use: 10% road, 90% dirt, lots of single track (this is my small bike).
10. Would you buy another one?: Yes due to reliability and great motor.
11. Did you replace the main shaft bearing (if applicable): NA for 2000 ?
12. Pic of the bike if available: will post later.

Wooops.....

[Happe]

Originally Posted by Elefant 900 Rad

11. Did you replace the main shaft bearing (if applicable): NA for 2000 ?

The models after 2003 have the uprated Mainshaftbearing.
Your 2000 Model still has the normal Ball Bearing. What is sort of a legacy from the older Lc4 Sports Days. The times when the engines got a revision every few races.
The swap is fairly easy.
I wouldn't do it now but next time you plan a large service and maybe some work on the clutch.

cu
Stefan

[willembron]

1. Bike: KTM 640 Adventure
2. Year: 2005
3. Bought used or new: new
4. Current mileage: 29650 km
5. Modifications done: Akrapovic, Woody's rims, lightning wires for better lights, tank protection, ...
6. Mechanical work done: many, water pump, rockers bearings, chain
7. Upgrades done: ...
8. Current tires on the bike: MCE Karoo
9. Percentage of road versus dirt use: 50% 50% I would say
10. Would you buy another one?: yes with 6 gear!
11. Did you replace the main shaft bearing (if applicable): nope
12. Pic of the bike if available:

[thisisjess]

1. Bike: KTM 640 LC4 Enduro
2. Year: 2000
3. Bought used or new: used 3/2012
4. Current mileage: 10,500 mi when purchased now 19,218 miles
5. Modifications done: easily adjustable mixture screw, USB port on bars, X2 headlight
6. Mechanical work done: nothing but oil changes, fork seals, leaky rocker cover...
7. Upgrades done: ...
8. Current tires on the bike: Shinko 705 then back to Michelin T63's
9. Percentage of road versus dirt use: 75% 25%
10. Would you buy another one?: I am in love. but on cross country trips an extra gear would help.
11. Did you replace the main shaft bearing (if applicable): nope
12. Pic of the bike if available:

[timolgra1]

1. Bike: 640ADV

2. Year: 2006

3. Bought used or new: used

4. Current mileage: 14,000

5. Modifications done: see upgrades

6. Mechanical work done: Fork seals, preventative maintenance: cam followers, water pump, suspension linkage, swing arm bearings, wheel bearings,

7. Upgrades done: fcr 41 carb, open air box, Akro, Renazco, bar risers, Ohlins steering damper, stiffer fork springs, high mudguard, crash bars, pannier frames, f650 screen extension, Exel front rim, HID lights, heated grips, QR fuel lines, Roadbook, hand guards......probably more

8. Current tires on the bike: F Michelin Desert R Dunlop D908

9. Percentage of road versus dirt use: 80% dirt

10. Would you buy another one?: If only!!

11. Did you replace the main shaft bearing (if applicable): N/A

12. Pic of the bike if available:

[overlandr]

bumpisch