Sunday Rambling

After the first “floating above the road” video, I did try to make a more lively video about the ride today. I hope it can make people excited about “adventure motorcycle riding”.

I know it isn’t a project which can compete with around the world documentaries, but I don’t want to do that at all.

It can still tickle the adventurer in everyone because all these, what you can see on the video is just at our door step. If you can spare 2-3 hours once in a month and put aside $3000-$4000 for a second hand motorcycle (it can be even cheaper if you are not afraid of doing some fixing and maintenance by yourself), you can ride the very same roads and much more.

I really hope you will enjoy the video.

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Tank bag

We haven’t done a product review for a long time and this is right because we spent the time with organizing rides and riding together.I was eyeing with tank bags for a long time but didn’t take the effort to get to a higher energy level which results in action. Durin the motorcycle show, I could visit the few accessory resellers and find out, there is nothing available there what would please me.

I was eyeing with tank bags for a long time but didn’t take the effort to get to a higher energy level which results in action. Durin the motorcycle show, I could visit the few accessory resellers on the showground and find out, there is nothing available what would please me.

krg01

Since I wanted to stuff only some small things into the tank bag, like wallet, phone, camera, etc. I was looking for a small one. After doing some “research” on the Internet, I wanted the Kriega OS 6 with a tank adapter. Since all the nearby or accessible stores in NZ had only the old Kriega US 5 bags, I decided to order mine from Australia (MX Store). The Kriega OS 6 was designed to correct some design flaw of the Kriega US 5 bags, and funny enough, I could get it cheaper (including shipping) than walking into a shop in NZ and buy the old design.

So get down to the bag. I think the original design idea is following the MOLLE design line which was developed for the army and stands for “Modular Lightweight Load-carrying Equipment”.

Since I was housebound for the weekend, I took my time to get things done properly.

The first thing what you need to do is secure two straps under your seat. It just did not go easy, the KLR presented a good mind-bending puzzle, to find not just a way to get this done, but get it done in the perfect way.

krg06

Finally, I got the two little plastic tabs sticking out from under the seat. Just in case, I put a bit of duct tape between the plastic tabs and the tank to prevent the paint being rubbed off.

Next item is to attach the tank adapter to it and drive two straps around the headstock of the KLR to secure it over the tank.

krg05

Yes, you see it correctly, it is covering the tank cap, and will need to be detached when I am filling up the motorcycle with petrol. I will find out later, how much trouble it is.

The Kriega OS 6 bag is neat and all the materials and the way of construction is convincing. It looks like something that will last, and this feeling is supported by the 10 years warranty coming with the bag.

krg04

After some wiggling and trial and error, I found the perfect place for the bag on the adapter and everything isn’t just ready for adventure now, but also looks good.

krg03

The summary of my experience is so far positive. Good materials, quality workmanship, and relatively easy installation. Let see how it will perform on the Northland Rally.

krg02

lic

Dying breed

Are “real dual-sport” riders are disappearing and the big bore, single cylinder motorcycles, like the KLR 650, a dying breed?

Everide put together a short, but very informative video on this topic. I would be very interested what do you think. If you feel so, you can send your thoughts to us through our contact page.

Here is the video.

MC mod

There is a mod from Eagle Mike, dubbed as the MC mod. In this mod, the exhaust cam has been advanced with one tooth (counter clockwise). They are claiming 7%-10% torque and horse power increase thanks to this mod and no downsides. No more oil or petrol consumed.

This last statement is a bit strange for me, because you cannot get extra performance out of thin air. This made me curious about what is in the background of this mod technically.

The engine is going through the four strokes as:

  1. Exhaust
  2. Intake
  3. Compression
  4. Combustion

4StrokeEngine_Ortho_3D_Small

Looking at a camshaft, the sequence would be as follows:

  1. The exhaust lobe pushes open the exhaust valve and the piston comes up to push the exhaust out, then starts to close.
  2. The intake starts to open, just as the exhaust is closing, piston goes down, and the intake valve closes.
  3. Then both valves stay closed for the compression and combustion strokes.

This means that the first lobe to come through the rotation will be the exhaust lobe, immediately followed by the intake lobe.

camtiming

Overlap is the point where the exhaust valve is closing, and the intake valve is just opening. To increase overlap, you have to RETARD the EXHAUST, and/or ADVANCE the INTAKE.  To reduce overlap, you have to ADVANCE the EXHAUST, and/or RETARD the INTAKE.

In our case, the MC mod is reducing the overlap between the operation of the exhaust and intake valves. In cam tuning it is known to increase low RPM power, and causing no change or reducing the high RPM power.

From the point of an outsider (me), looks like when the exhaust valve closes earlier, no air/fuel mixture can escape through the exhaust valve and also, maybe, a bit higher pressure will be present in the cylinder when the piston starts to move upwards.

For me, seems that there is no “negative” effect of this mod, because the extra power is earned from saving a bit of air/fuel mixture by not letting it escape through the exhaust valve, but I don’t have real experience in internal combustion engine tuning. If you find my logic faulty, please let me know and we can discuss it and I will update the post accordingly.

Here is a video of guys doing the MC mod.