What dont you like about the tm40?

I have freewind with jet kit and cams..same at traffic lights situations))

Thank you for your kind reply! Videos are obviously not my strength but seeing such nice comments are very inspirational to me.

just a gopro chest mount. sorry, not to good at this. thanks for the reply.

Okay really? Cool. Been riding that road regularly since the early 90s.

Lee H , I got the bike sorted jetting wise and it pulls better on the higher rpms now. The bike is a hoot because of the wide torque range. It isn't that high of HP. It really is everything I like about the DR "amplified". With the FCR, the throttle response is good. Tires are hard to keep on the bike. Thanks for the comment!

I know the feeling.

Thanks for the kind words! I just changed back to the stock 15:42 final drive vs the 14:43. I think the bike is faster on acceleration and now is super comfortable cruising at 70 mph (calibrated trail tech indicated). Really not too bad up to 80. The bike wants to be over 50mph on mountain roads before fifth gear is selected. Not the "performance" shift point at full throttle to 5th gear is in the high 60s to even 70 mph. I'm liking it. I need to ride it more. May make another short video.

@@cogentdynamics Got it! Thanks for the response

Leo Vince exhaust at most restrictive setup (most quiet) and the FCR MX carb. I’ve played with it more and it is running better than in the video.

@@cogentdynamics nice im excited to install mine

fcr 39 not jetted in this first run.

Taller gearing is looking helpful.

On this bike?

OZ Outdorz I am sticking with 14-42 since first gear gets too tall off road. It will pull a lot more gearing on road.

Changed to stock 15:42 and like it better as the engine is able to pull gears much longer and better. Thing woods riding with clutch slipping needs to be relegated to my KTM! I fried the DR clutch doing the slow woods stuff (mud, rocks and log crossing) engine gets too hot in those conditions a d extra power isn't useful under those conditions.

@@cogentdynamics Trans gearing is now available from ProCycle for the DR650. Lower first and second gear with taller than stock 3rd, 4th and 5th. Two different gear sets available. Make sure you're sitting down when you check the pricing though!

decided to ad heated o2 sensor to improove jetting, all is better now.

I have a 16mm Brembo and yes the lever ratio and friction is better but the cylinder is bigger than ideal for the stock caliper. I haven’t found one I could adapt.

@@cogentdynamics cheers. Have heard of guys using 10mm brembos off ktm dirt bikes. I have arthritis in my hands so a lighter lever pull would be great.

Where have you heard that?

Yes, I really like the wheels, they are stronger and make the bike feel better (I assume it's down to the stronger spoke system). Thank you for your comment!

It has an FCR 39. I have is much better jetted since I took that maiden ride. With the jetting for the stock 650, the 790 was very rich on the main jet. I love the bike!

@@cogentdynamics Nice! I have a DR650 as well so thanks for the mod ideas!

I m using an over size rotor, excellent pads and a Brembo radial master. More better would be great!

Worse than before... eats tires for breakfast...

@@cogentdynamics hahaha

@@user-tc2hu1mr3k yep, I fell faster! Still goes. It runs out of high gear in the video. My impression. I have done dyno testing of both DRs back to back. An issue is that the clutch gives up the grab at some point… I need to add extra clutch plates. New EBC plates and heavy duty Barnett clutch springs made a big improvement but only really strong for a couple rides before limiting the power. To be clear, I am not recommending this modification I like it and makes my own bike cool. A friend has built and owned the 900cc DR. Two friends have had the same bike. Lots of effort and expertise in that bike. Was it worth it? Each rider decides. I do love my DR.

Sorry for the late reply! Check Out Procycle.US for the parts. The cylinder is available as an exchange. The bike is fantastic! It gets hot though.

@@cogentdynamics Hot enough to be a concern?

@@codyf8511 I haven't found enough information for me to make an educated judgment. Straight up and not so educated I have to say, yes I'm concerned. I am running a very restricted exhaust which I just changed to a more free flow stinger in the LEO Vince and one ride makes me think it helped but more rides would be needed to be conclusive. I can't ride it this loud. I hate it loud, makes it no fun. I like it fun! I'll be experimenting with an FO40 titanium GSXR can. No one seems to be able to give me comparisons with their cylinder head temperature.

Would like to hear updates on this situation. Thanks

Last I looked, it was around 54hp w/50 ft/lb of torque

@@SmalltimR My calculation were bad. Should be more like 10hp. Quite abit of money for only that much more horsepower?

@@authentic4225 According to ProCycle's dyno chart, a stock DR puts out roughly 36hp, whereas the big-bore puts out 54, for a difference of about 18hp. Though I think it's important to note that HP is not as significant as torque in such applications, and that 52 ft/lb of torque is rather intense for a 370lb bike. With that said, I'd love to see the hp from a big valve kit, cam and larger carb coupled with the big bore. I'm guessing closer to 60hp when all is said and done :) ps. for contrast, the Tenere 700 which is a much heavier bike, puts out around 44lb/lb of torque at the wheel

I haven’t seen 50hp on the Dyno. I am still struggling with getting the clutch to hold. That an another project!

Side by side it is enlightening. For sure the CC expansion without multi cylinder, rpm limits and valve area (along with mechanical durability) have not going to have a ton of horsepower.

Does this engine have the oversized valves?

@@TheTroopertruck nope, I went with the stock valves. It would be interesting to see how the bike would perform with 650cc with high compression piston, a little hotter cam and the bigger valves with port improvements. In any case, in my opinion the engine HP will be a limited by the reliability. Power equals heat and stress on parts.

@@cogentdynamics thanks for the reply, I just acquired a 2009 dr650 with 112000km and am considering the 790 as it probably needs an engine rebuild, I was reading through your responses and wondering if the bigger valves may have helped with the heat problem as you said the free exhaust helped, I am not decided on spending the money on the cam. But also considered the high compression 650 build as well

@@TheTroopertruck keep in mind that your stock cylinder can be refinished like new for a couple hundred bucks. That and a high compression is a nice setup at a much more reasonable cost. The first video was (like a year or so) ran with a restrictive exhaust (I prefer quiet). Hot was an issue. Also, the clutch was slipping also as the big engine pushes everything. My other DR650 is still running stock and do still like that one fine also but without the worry.

I don’t think it is much over stock with no re gearing. The power tapers at higher rpms. I suspect the breathing is limited. I have a restrictive exhaust too. Just back from Moab and this bike is so usable, I LOVE it!

More power at the same peak RPM doesn't add top speed. You need more RPM to make more top speed, or regear.

Don’t know. I suspect the top speed will be very much the same as stock. Up hill and in a head wind it will improve. Gearing is a limitation as is the poor aerodynamic shape of the dual-sport. The 790 is designed for mid-range power. Top end hp becomes somewhat limited in the valve and port limits. The bike will go near 100 mph. That’s about it.

Is that good or bad? 😊

How? You want something that sounds like a sewing machine get a bmw twin. This sounds beastly

Best part. My moded dr gets lots of attention at lights and gas stations

Whine much?

I had one of those on the stock 650. It got obnoxious and later sorta shattered like glass after a number of years. Update, I added a f40 Suzuki GSXR can and the bike runs better and cooler than the choked off Leo Vince. Thanks for the comment!