Posts Tagged ‘lc4’

Today I have finally fund some time to install a proper chain guide to my 640. Thanks to inmates for pointing me in the right direction for the parts I needed for this.

Parts needed:
-54607066100 CHAIN GUIDE REAR ’94
-1 large M6 washer
-1 M6 nut

Note: On KTM 660 Rally they only use the chain guide without retaining plate

This is what we will be replacing

With this

Remove the 2 bolts that hold the old chain guide on the swingarm and be careful, there is a spacer back there.

That spacer will be replaced by the retaining plate front bolt hole.

The bad thing about this upgrade is that you have to take the chain apart. So if you are changing your chain, now it is a good time to add a proper chain guide if you wish.

Once the chain is threaded through the guide, you can start bolting everything back together. Tighten the front bolt just enough so that the whole thing doesn’t fall apart, now align the rear bolt for desired hight.

Now this is where I have been playing around and swapping parts. Since there is really small gap between the rear bolt and sprocket (5mm or 0,20 inch) I have used a collar nut from the front bolt to save on space, and used a new nut and washer on the front as there is more than enough space. Once both bolts are tightend (don’t forget to use Loctite) the thing is rock solid.

That is it. You are done. I feel this is a worthy upgrade to anyone that rides more off road.

Stay safe!


Last year, about the same time as today, I was going around Google searching for some enduro gatherings, rides,… here in central EU/Balkans and curiously enough I came over a Serbian enduro challenge. Unfortunately I have been to late for last years edition of it, so I have decided I will make a mark on the calender so that I don’t miss it next year.

New year has passed and a new site was created for the race. I marked the date 22.5-24.5.2015 and asked around a bit if anyone wants to join. I was lucky enough that a good friend decided to join the ride. As we live around 750km from the race site and we have decided to ride our bikes there, do a race and ride back, we needed more than just a weekend off from work. And that is when we have decided to start on Thursday, after work and return on Monday evening.

So the fact that we are leaving for a race got me a bit worried and I packed more stuff for the bike that I might actually need. I had a redundancy planed for almost every occasion and the gear showed that. From oil, to coolant, clutch fluid, spark plug, levers, patches, engine block sealant, JB weld,… It might have been a bit of a overkill but better safe than sorry.

Day 1
The departure day has arrived… I left the work early as I had 3h of riding to do to our meeting point. All packed up and ready to go I left for my first destination, Bregana border crossing.

Half way to the border it started pouring from the sky. But I was on my LC4 heading towards a adventure. I arrived to Bregana a few minutes early, just enough to stretch a little and grab a sandwich.

From here on out, there was 2 KTM’s riding towards the same goal. Since we were a bit tight on time for the first day and it was raining we took the Croatian highway from Samobor to Slavonski brod, which took another 3h of riding. Riding a enduro bike, without any fairing and with knobbly tires in pouring rain on highway is not my idea of fun ride, but it was a necessary evil to get half way towards our final destination.

In Slavonski Brod we have crossed the border into Bosnia and started looking for a place to sleep and dry out as we didn’t have any reservations. At 8:30pm we arrived at a good looking Motel Dvor in Derventa. Luckly the staff was great and though full on their regular rooms, they found a spot for us. Once here a marathon drying has begun.

Day 2
In the morning we saddled up for another rainy day of riding. We headed south towards Tuzla on on the main road. It was slippery as hell, from all the oil and stuff on it, you could spin the rear wheel in 4-gear. Also the traffic was suicidal. We made a quick break just outside Tuzla to check the map, as my GPS was acting up the whole time.

From here we started looking for some gravel roads over the hills to get out of traffic. We have found a nice, about 30km, long stretch of gravel, unfortunately no pics as it was raining hard. When we came back to the main road and checked the map, I saw that we were really close to Srebrenica. On my wish we made a detour to there, as I wanted to see the memorial site for the victims of genocide. We didn’t take any pictures there as they were having a ceremony, so we looked for a far and went to get some gas.

We were really close to the border and weather was getting better. As soon as we crossed the border the rain stopped. So we took one last look towards Bosnian hills from which we have just descended.

And took a quick look down the road where we had to go.

From the border to race site and our hotel was just a 20km ride in DRY conditions for the first time in 2 days. Arriving at the hotel, we checked in and went to our rooms. Well lets just say that the rooms weren’t much…

I wanted to dry my gear outside, lets just say that it was a bit of a challenge getting to the balcony. 22

So we changed into our civil clothes and went to the race officials to get registered. Let me just say that the organisers really had put a lot of effort into organising this event, it was really top notch.

Now it was time to get the bikes ready for the race day. Lowering tyre pressure, getting rid of all the unnecessary gear and most importantly adding a start numbers to the bike.

Now it was time to go for a beer and than to bed, because after 2 rainy days in the saddle on our LC4’s we were really tired.

Stay tuned for part 2, the race day.

For long distance off road riding, you need to be able to take care of yourself, your bike and your electronic equipment (phone, camera,…). And to be able to charge all those hi-tech gizmos on the bike you need some kind of a charging socket. There is a variety of things available on the market today, but I have decided to go with a standard waterproof 12V socket.

Once you decide what to use, it’s time to find a place to mount it on the bike. After looking around the bike for a while and testing/evaluating different positions, I have decided to cut a hole in the dash board.

Here is what I intended to use, a socket and a on/off switch. Unfortunately there was not enough room for both behind the headlight mask.

Now the nerve wrecking part, cutting a hole in the dash… Luckily everything went great and I nailed it on the first try.

Just enough room to tighten the nut up.

Now all I needed to do is to strip the bike down and run the wires.

Crimped on some connectors, plugged them on, and tidy the wires behind the mask. Make sure you put a fuse on the + side as cloese to the battery as possible.

Now I have constant power at the socket, like I had on my KLE before. Here are before and after pictures

Stay safe!

Bagging up

Posted: 05/04/2015 in Modifications archives
Tags: , , , , , , , , , , , , ,

Today I have spent a few hours in the garage looking at where to mount a Kriega US-5 to carry my tool-kit or my medical pack. First I was looking at the rear fender.

Took a while to disassemble the rear of the bike, only to find out there is no space for the bolts. Looking at the above picture, two most left holes, didn’t have enough space below the fender for washer and a nut. So I reluctantly reassembled the back end together. Checking out the bike with a stuffed bag, I have found a nice spot, on the fairing just above the headlight. On a second thought, that fairing might not be strong enough to support the weight of my tool-kit over rough terrain.

So the only spot on the bike left, was the tank. The stuffed bag looked good on the tank, but I don’t have Kriega tank adapter, so I needed to figure something else out. Bottom strap was not a problem, just threaded it under the seat. Top was a bit more challenging. Straps wouldn’t fit around the frame tube, so I threaded them around radiator shrouds. I was quite happy with the position of the bag, but didn’t like all the straps hanging around. After a few more attempts, I was happy with the result.

There is enough room at the handlebars not to interfere with steering, or steering lock.

It sits nicely on the tank. And it won’t get in the way when standing like a standard tank bag.

That is it for now, field test will be done as soon as the weather improves.

Stay safe!

Today was a nice sunny day here at my place, and instead of riding I have decided its time I tackle the GPS power cable installation. After looking around under the seat, and failing with finding any suitable place, someone has suggested to wire it up to park light.

So I have taken the mask off and had a look inside

I have stripped the park light wires and tested the polarity. White wire is positive (+) and the brown is negative (-). After that I have found a nice place for for the fuse holder and soldered everything together. Its a bit of a mess behind the headlight on those Enduro models.

Fuse holder sits nicely above the connectors and tightly wedged untder the dash screws.

The GPS plug is located at the brake and speed sensor cable guide.

Here is everything buttoned up, also with new mirrors.

And the view from the seat is great now, and I won’t get lost any time soon, hopefully.

Stay safe!

So the final part of my spring preparation was sprocket and chain swap. From what I have gathered form different forums and people that have been riding the 640’s for year is that the best option for the front sprocket is that OEM KTM ones, and they are also quite cheap. For the rear I have went with JT Sprockets and the OEM KTM didn’t have the one with tooth count that I needed, and the chain I chose was a DID 520VX2, its a 520 spec chain with x-rings.

So it was time to jack-up the bike and start tearing it apart, yet again.

With the new sprockets, I have also decided to also change the gearing. I went form 16/42 stock ratio, to a 15/44, recommended by a good friend. After a few rides, I really like this setup and with a throttle cam system, the bike has really, turned in to a crawler at really low revs.

After removing the old rear sprocket, I have thoroughly cleaned the bolts so that loctite would hold when I put everything back together.

Shiny new rear sprocket on the hub.

Before I had reasembeled the rear end, I have takent the adjuster bolts out and dipped them into anti-seize high temp paste so that they wont seize up again.

Next I installed the front sprocket up, just so that I could measure the chain length needed. I got a 120 link chain so I knew I had to take some links off.

Shortened up and put together with quick link

After that it was all just the matter of torquing up the front sprocket and cleaning everything before use.

All you need to do after a this is go on a short ride to check everything and after that re-adjust the chain tension. This should hopefully last at least 2 seasons of riding.

Stay safe!

So I am getting close to finishing the bike up. So in this garage session I have tackled the last few bits of work I have left. This afternoon I had some help so there aren’t many pictures. First of all I have changed the clutch master oil. I have used a BelRay 2,5w fork oil in it and it works great.

This is where I left off in part 2

Next I have oiled a new Twin-air air filter and threw the old one away.

I got a new battery under warranty installed it and tried the e-start for the first time in I guess 2 years, according to PO when I bought the bike. It turned the engine, which was great to hear.

That out of the way, I turned my attention to the most ridiculous and complicated oil change process ever invented. I think those Austrian engineers were drunk or had a serious hangover when they designed the oil system on LC4’s. Luckily there are good people on that has made things more clear, but still it took a lot of time.

I have use KTM OEM filters and gasket, with BelRay Thumper Racing Syn Ester Blend 4T Engine Oil 15W-50.

Last oil change on this bike, looking at the date I found on the small inside filter, was 13.6.2014, its good to know that the bike had fresh oil in regular intervals. But I guess PO didn’t have any idea what is with the plugs on the bottom of the engine as the situation there has scared me a bit. Do you see that error?

He has put the oil drain plug, with the spring in the by-pass valve hole, and the plug for the by-pass valve in to oil drain plug. I have tried correcting the mistake but the threads wouldn’t engage the oil drain plug in it’s rightful hole, so I had to leave it as it was.

Last, but not least, I have changed most of the the bolts that hold the plastics on with new ones.

Last thing I have to do is change the chain and sprockets on the weekend if I will have any time.

Stay safe!