The BMW HP2 Megamoto thread.

[sunandsand]

Originally Posted by HPSaucy

Would you post some pictures of the fork clamps and rear shock height & preload setting please.

How how much did you change the rear damping too, fractionally, or massively?

The rear shock damping does not seem to need much change. Ohlins did a great job with the valving to put the effective range of adjustment attainable with the compression and rebound adjustments. A visual of my rear shock will not be useful because you will need to adjust your preload when you set up your shock to achieve your desired preload and fork position will also need to be measured upon install. The ride height adjuster on the shock is simply turned all the way down to shortest position. I'll get you some pics soon.

Now if only this type of suspension service were available in NY!

Any motorcycle shop or dealer can order the gold valve from race tech with the desired valving for the MM, fork springs, install the parts, and set up the proper oil level for you. Most mechanics that have been around for a while have been inside enough forks to easily take the MM forks apart. You can also send your forks and shock to race tech. Or if you're handy, you can do it all yourself. I made some subsequent valving changes to my forks in my garage. You can have the fork pistons and valving in your hands in less than 15 minutes. The rear shock is a different story though unless you have a nitrogen tank at home.

[RoteEddie]

Anyone have the details of what fork oil I need for a service, and how much I need to put in?

[sunandsand]

5 weight, factory calls for 10 weight and 80 mm oil level (they were so far off). I tried 140 mm the first time but have settled on 130 mm from top of tube, forks collapsed, with springs and spacers out. For your weight. I would set it to 135 or 140 mm from top. As far as volume of oil, I can't tell you as I've not completely drained and checked volume. Checking level is the most accurate and don't forget to bleed damper rod/piston well.

[RoteEddie]

Thanks for the info, Sun! Could only get hold of 5w oil so I'll give it a try. Do you have any tips for the fork disassmbly? I'm new at this....:-)

I have made a small video of both my bikes doing my local roads. Roads were slightly dusty from the gritters pestering our roads when the frosty nights have arrived. Cornering speeds were adjusted accordingly, especially on the MM ride. Just enjoy the scenery! Looking forward to spring allready

This was shot with a ContourHD. I'm not too chuffed by the quality, and the sound is useless. I'll be investing in either a POV 1.5 or the new GoPro Hero HD for next season.

http://vimeo.com/8226600

[HPSaucy]

Wow, that is simply stunning countryside, thank you for sharing!!

[hankgs]

RoteEddie,
I would like to propose that we do a MM exchange September of 2010! You can ride my MM over here in California, I will fly into Oslo...

[RoteEddie]

Originally Posted by hankgs

RoteEddie,
I would like to propose that we do a MM exchange September of 2010! You can ride my MM over here in California, I will fly into Oslo...

Not a bad idea! As I have 2 bikes I would have no problem letting you have my MM for a few weeks :-) Late May and September are usually good here.

[HPSaucy]

Me too, me too, seriously, I'd love to ride in Norway, what a dream!!

[sunandsand]

Originally Posted by RoteEddie

Thanks for the info, Sun! Could only get hold of 5w oil so I'll give it a try. Do you have any tips for the fork disassmbly? I'm new at this....:-)

http://vimeo.com/8226600

I have a gopro hero HD and it works very well and takes good video.

Are you going to only change the oil or will you need to disassemble? This link http://traxxionstore.com/detail-12.aspx has a couple of tools that are very handy for working on your forks. You will not need the spring compressor to work on the MM forks but the oil level tool and the brass rod are very helpful. The spring compressor is necessary for working on most showa/KYB forks. The syringe allows you to just pour oil into the forks and you then adjust the height of the stopper on the hollow rod to the desired oil level and extract the oil until the level falls below the tip of the rod. Voila, instant correct oil level. The brass rod screws/grabs onto the top of the damper rod and allows you to pump the piston/shaft up and down so you can bleed the assembly. Without the rod, you would need to use pliers or grab the top of the damper rod with your fingers but not be able to lower it far enough into the fork to do it properly.
You can drain the oil out by taking the piston assembly out of the bottom of the tubes. It's a 21 mm nut but you will need a impact wrench to get it out due to the rod spinning inside the forks. If you do not have an impact wrench, then you will need to take the tubes off the bike so you can pour the oil out of each leg.

The easiest method of taking the forks off the bike is as follows:
place bike straight up by using rear wheel single side swingarm stand. I use the pit bull model here. http://www.pit-bull.com/Merchant2/me...ory_Code=MSbmw

Use a floor jack or other jack with pad or wood and place under thick casting on bottom of engine. There is what appears to be a front lower motor mount hole that is not used on the MM. Place pad just under that. Lift until front tire is just off the ground.

-remove 2 torx bolts (only the 2 in front of the fork tube, not the rear bolt) holding front fender on left side of forks.
-slide front part of fender outward to have access to loosen 2 pinch bolts on lower left fork leg. (you will leave the fender on until the right fork leg is off the bike before removing it so it does not get scratched)
-remove large axle end nut (large allen head)
-place large rags over front brake calipers, so as to not scratch rim, and remove from lower legs. Let hang behind tire.
-remove the same 2 torx bolts on the right side of the front fender to gain access to right lower fork leg pinch bolts and loosen pinch bolts. (fender is still attached by 1 rear bolt on each side of fork leg)
-slide axle out and pull front wheel forward and set aside.
-loosen right fork pinch bolts and slide right fork leg down and remove. Be sure to have a safe place to set leg so it does not fall. I have a drawer that is next to my toolbox with rags in it. It sits in the drawer while leaning against the toolbox.
-Finish removing front fender, 2 more torx bolts, and set aside.
-Loosen left fork clamp pinch bolts and remove left fork leg.

Assembly is reverse of removal with a few notes.
Take a screwdriver and slightly spread brake pads apart in calipers before sliding onto rotor. It makes it much easier.
When you have the axle pushed all the way in the lower legs and against the left spacer on the front wheel, just barely snug up right side lower leg pinch bolts before tightening axle end nut to 50 nm. Then loosen right side lower leg pinch bolts, tighten left side lower leg pinch bolts to 8 nm, and release jack from under bike and remove. Grab front brake and compress forks several times to center lower leg on axle prior to tightening right side lower leg pinch bolts to 8nm. Torque Top triple clamp pinch bolts to 16 nm and lower triple clamp pinch bolts to 10 nm. Do not over torque the bolts!

Important notes for the forks! Once you have the top caps off the forks and spring and spacer removed, be very careful to keep a good hold of the lower and upper assemblies of the forks and to make sure you keep them together. The fork upper and lower will split apart in your hands and separate if you do not make sure to keep them together. The best thing to do is to clamp the lower fork leg into a vise by using soft aluminum blocks in the vise and clamping the forks on the outside of the brake caliper mounts.

good luck

[RoteEddie]

Damn, Sun! All those words makes me want to leave it to the pro's

OT: I have a different hobby that I have too little time for, rc sailplanes. If you want to have a taste of Norway I highly recommend watching this video preview; http://www.reeseproductions.com/mpegs.html , click on "Lift ticket to Norway".

[HPSaucy]

Thats a great song, and a lovely vid.

I'm sure you've seen this one before, its been doing the rounds, but it is so great it bears sharing again.

[sunandsand]

Originally Posted by RoteEddie

Damn, Sun! All those words makes me want to leave it to the pro's

OT: I have a different hobby that I have too little time for, rc sailplanes. If you want to have a taste of Norway I highly recommend watching this video preview; http://www.reeseproductions.com/mpegs.html , click on "Lift ticket to Norway".

It's really not so bad. From the time I put the bike on the center stand until I have the fork legs in my hand is not more than 10 minutes. A dewalt electric impact wrench makes it go very quickly. From that point on, I take my time working with the internals and take my time re-assembling.

I've always wanted a RC plane. A friend of mine has a few flying wings that I've flown and it's a lot of fun. Norway is a spectacular country. I spent a xmas and new years once in Trysil downhill and x country skiing, so have seen a little bit of Norway. I don't know how you tolerate the lack of daylight this time of year with the sun at 20 degrees on the horizon at noon and things starting to get dark at 15.00 hrs.
Well, I'm out the door for a bike ride. It's 22C right now and sunny......

[Maineroads]

Nice, I've got 20F! Think I'll ride my tractor today.

[RoteEddie]

Originally Posted by sunandsand

It's really not so bad. From the time I put the bike on the center stand until I have the fork legs in my hand is not more than 10 minutes. A dewalt electric impact wrench makes it go very quickly. From that point on, I take my time working with the internals and take my time re-assembling.

I've always wanted a RC plane. A friend of mine has a few flying wings that I've flown and it's a lot of fun. Norway is a spectacular country. I spent a xmas and new years once in Trysil downhill and x country skiing, so have seen a little bit of Norway. I don't know how you tolerate the lack of daylight this time of year with the sun at 20 degrees on the horizon at noon and things starting to get dark at 15.00 hrs.
Well, I'm out the door for a bike ride. It's 22C right now and sunny......

I envy you that :-) The only reason we can tolerate our winters are our spectacular scenery and long days in the riding season. Here on the westcoast we have fairly mild winters. Right now we have snow, and tomorrow I'll be out driving my Öhlins shod and supercharged Opel Speedster on studded tires. It's a lot of fun

[hankgs]

Kind of an interesting video of an HP2 / Japanese style. The riding is pretty mild-mannered, but a nicely done video...


http://www.youtube.com/watch?v=CTmkd...esh+div-f-7-HM