ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-15-2009, 03:05 PM   #29161
Ralph64
Adventurer
 
Joined: Sep 2009
Oddometer: 175
Quote:
Originally Posted by tjoseph
Yea, it's useful. In about 2% of my riding. But I find that I'm rarely in need of peak torque. For my particular style of riding, my bike rarely gets to wide open throttle. I'd spend money on handling mods, better tires, and lots of other items before I'd go looking for more power from the bike, particularly if that bit of power comes with a hacked up airbox that is going to increase noise levels and suck in water during stream crossings. Now if it's addressing real rideability problems - such as lean surge - I can see tinkering. But in my experience, things like dynojet kits rarely make more power that you actually use, they just burn more fuel. Lean surge can usually be cured by the pilot screw adjustment or a washer under the jet needle, and nothing more. Same reason I don't recommend aftermarket exhausts. The minor power increase comes at a major increase in noise. All the energy spent chasing a couple of foot lbs. or HP would be better spent for most riders by actually practicing their skills a bit.

The factory engineers aren't morons, you know. They know how to make more power too. But they reach compromises of power production, in order to do other things - including having the intake system quieter, keeping junk out of the intake tract, meeting emission controls, and providing better fuel economy. For some, that isn't a compromise worth taking. I'm different in that regard. I've never found the stock power production that limiting. I pretty regularly ride my DR at 80+ mph, and I've never found a hillclimb the bike couldn't do because of its power production. If I want to ride considerably faster than that, or terrain more rough than that, I just take another bike. I'm not suggesting nobody should modify the bike for more power, but personally those are the mods I would either not do at all, or only do if lots of other stuff had already been done to the bike. It's just in my view, more power isn't even close to the top of the list of improvements to be made to the bike.
I can understand what you are saying to a point, but that almost reads like a soap box rant . I rode my bike with the engine almost completely stock for nearly 80,000km of touring in Eastern & Western Europe, Middle East, Central Asia, SE Asia, Australia and many trips to NW Africa. It has served me well as an inexpensive, quiet and reasonably economical touring bike. Other than the occasional trip to NW Africa this bikes extended touring days are over. The engine is showing its age. I hope to be able to pull the motor out for a rebuild at the end of winter and it will receive a forged piston, TM40, etc, while still trying to maintain a degree of decency in the area of noise.
Why? For the same reason many other people do... because I can and I want to. That is the only reason that matters worth a damn. If you are happy with your bike as it is then more power to you.

Cheers

Ralph64 screwed with this post 11-15-2009 at 03:13 PM
Ralph64 is offline   Reply With Quote
Old 11-15-2009, 03:07 PM   #29162
Ralph64
Adventurer
 
Joined: Sep 2009
Oddometer: 175
Quote:
Originally Posted by Elvis70
I bought one of the uni secondary filters from pro cycle. I've got some K&N filter cleaner and oil left over from a previous vehicle with a K&N. Is that allright to use on that little secondary filter?
It'll be fine. Better if you remember to clean both filters together every time and not neglect the secondary.

Ralph64 screwed with this post 11-15-2009 at 03:14 PM
Ralph64 is offline   Reply With Quote
Old 11-15-2009, 04:22 PM   #29163
drsmiley
Gnarly Adventurer
 
drsmiley's Avatar
 
Joined: Dec 2008
Location: Atlanta, Ga.
Oddometer: 252
Handguards and Bars

I'm planning on putting Cycra Probend Handguards on my 08 DR650, was thinking about getting new bars also, should i get 1 1/8" or 7/8"? If i get the Pro Taper EVO bars what bend is equal to the stock bars, and I know I'll gain 3/4" with the clamps. Also what is a good comfortable grip to go with? Any info appreciated!
drsmiley is offline   Reply With Quote
Old 11-15-2009, 04:40 PM   #29164
Elvis70
No speed traps in the sky
 
Elvis70's Avatar
 
Joined: May 2008
Location: Fayetteville, AR
Oddometer: 5,053
Quote:
Originally Posted by drsmiley
I'm planning on putting Cycra Probend Handguards on my 08 DR650, was thinking about getting new bars also, should i get 1 1/8" or 7/8"? If i get the Pro Taper EVO bars what bend is equal to the stock bars, and I know I'll gain 3/4" with the clamps. Also what is a good comfortable grip to go with? Any info appreciated!
Bar size is your call. I have the 7/8ths. I like the look of the padded crossbar. But now I am thinking the the fat bars might be better for less clutter. I have Pro Taper 7/8ths CR mid bend and just about the same as stock. The pro-taper pillow top grips are nice too(what I got).
__________________
I'll tape it to the handlebars, it's just logic George! If your hand is broken, you tape it to the bars! - Evil Knievel's reply to George Hamiliton's question, "How will you jump with a broken hand?".
Elvis70 is offline   Reply With Quote
Old 11-15-2009, 05:04 PM   #29165
Zapp22
ZAPP - Tejas
 
Zapp22's Avatar
 
Joined: Oct 2004
Location: Tejas Hill Country
Oddometer: 13,585
Bluhduh CONFESSIONAL: I goofed a wheel... lesson learned

They say confession good for the soul.

Put 2 new tires on my trusty 'ole '97 - IRC GP1's... had previously fallen in love with them on the '02.
pulled the wheels, don't have tire tools properly, so took wheels and tires and tubes to the local shop. they put 'em on and spin balanced. I took 'em home and put the wheels back on just like I had removed them... so I thought. Everything LOOKED right and I double checked the work vs. the '02 and vs. the Shop Manual. But in my gut I kept feeling like something was amiss. went for very short drive. didn't hear or feel anything strange but I was still struggling with that nagging something. Next day the dealer called and left message; "found a spacer laying around the shop... is it yours?". So with the shop manual on my screen I called them back and the guy there pulled up the same. we both snooped the diagram and both of us missed the spacer. He concluded it belonged to another job.

So I went for a 10 mile jaunt and had that nagging something.... ran ok, I thought, and rolled ok, until I applied the back brake going into a turn and when I pivoted right to look for traffic etc I hear a faint "eekk.. eeekkk.. eeekk" through my helmet. stopped, looked everything over. didn't see anything odd. But by the time I rolled into the driveway I was getting a 'lumpy' back brake feel. The missing spacer is/was the one that keeps the caliper at the proper attitude vis the hub!!!! the Caliper bolt was extended through its hole/seat just barely... just barely enough that the end of it shaved off against the rotor. fortunately, the caliper endured most of the damage, and its in a strong spot so I think all is serviceable. I had to chip off some bolt residue from the rotor using hand pressure and a wedge!!! yikes. Got the spacer back and re-installed everything.

sheesh.. you would think that having done this before I would remember everything, but I didn't. too long between tire changes.
__________________
Zapp
"I will not let the White City fall... nor our people fail. - Aragorn
K4 WEESTROM Stealthfighter Black -SOLD - Invisible to Radar, '02 DR650SE SOLD ,'Ole 97' DR650SE My Fave K5 WEESTROM ADVbomber
Zapp22 is offline   Reply With Quote
Old 11-15-2009, 07:01 PM   #29166
Cyclepath
Gnarly Adventurer
 
Joined: Mar 2006
Location: SW Washington, USA
Oddometer: 359
Quote:
Originally Posted by procycle
An 8% improvement from simple modifications isn't impressive??
It's quite comparable to switching from a 15T sprocket to a 14T sprocket which comes in at about a 7% increase in torque at the rear wheel.

Thinking of it another way, with the 3.79 ft/lb increase in torque your bike would accelerate faster with a 16T front sprocket than without the mods and stock gearing.

But the 8% increase is only part of the story. If you look at the graph the modified bike makes more torque from about 3500 rpm to almost 6000 rpm than it did at it's peak when all was stock. That's significantly more power over pretty much the whole usable power spread. If you could ride these back to back you would be shocked at the difference.
hello procycle, i worked in the experimental research and development lab for kiekhaefer aeromarine for quite a few years. so yes i understand the charts. the dyno room was one of my favorite places. so as far as i'm concerned what you are calling an 8% increase is not worth the time and expence involved. especially if i have to put up with a 13 mpg decrease in fuel milage. for some reason my bike has always got between 63 and 58 mpg. stock 08 with only the idle mixture screw adjustment. i also tried the remove snorkel, shim under needle, hole in slide, backfire screen removed and it also dropped my mileage way to far to justify the pathetic increase in performance if you could even call it that.

cyclepath
__________________
Age is just a number !

Bikes i own......
08 DR650
93 gl1500 aspencade
80 gl 1100, naked
03 TW200
94 TW200
73 Bultaco Alpina
?? Montesa cota 25
68 Honda express, 50cc
68 Honda CT-90
?? Suzuki TS-90
82 Honda CX500 custom
80 Honda CX 500 deluxe
2000 Kawasaki W650
80? Junk Honda Shadow
Green Mountain Vintage Cycle Restorations
Since 1999
Cyclepath is offline   Reply With Quote
Old 11-15-2009, 07:23 PM   #29167
NordieBoy
Armature speller
 
NordieBoy's Avatar
 
Joined: Dec 2006
Location: Kiwiland
Oddometer: 7,063
Quote:
Originally Posted by Zapp22
sheesh.. you would think that having done this before I would remember everything, but I didn't. too long between tire changes.
Yep. The good old cush drive spacer...

Been there - done that.
NordieBoy is offline   Reply With Quote
Old 11-15-2009, 07:36 PM   #29168
procycle
Beastly Adventurer
 
procycle's Avatar
 
Joined: Jun 2007
Location: Center of the DR650 universe
Oddometer: 2,045
Quote:
Originally Posted by tjoseph
But in my experience, things like dynojet kits rarely make more power that you actually use, they just burn more fuel.
Only if the person doing the tuning sets it up too rich - which is an easy mistake to make. When properly jetted the DR will easily get 50+ mpg along with a big improvement in driveability and better power delivery.
__________________
Clarke's second law of Egodynamics: "For every expert, there is an equal and opposite expert." - Jasper Fforde
www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning
procycle is offline   Reply With Quote
Old 11-15-2009, 07:48 PM   #29169
NordieBoy
Armature speller
 
NordieBoy's Avatar
 
Joined: Dec 2006
Location: Kiwiland
Oddometer: 7,063
Quote:
Originally Posted by procycle
Only if the person doing the tuning sets it up too rich - which is an easy mistake to make.
Especially if you follow DynoJet's instructions.
NordieBoy is offline   Reply With Quote
Old 11-16-2009, 12:17 AM   #29170
Blake Kennedy
Tassie devil
 
Joined: Nov 2009
Location: Tasmania, Australia
Oddometer: 30
The reason I am chasing power gains is part of the whole reason I bought this bike. I ride with a mate on gravel roads that has a TE570 (heaps more power than a DR650) and I also want to do some adventure style riding.
I made a compromise when buying the bike so I am just trying to get it closer to being competative with the Husky. I could have bought another husky but the adventure side would be too expensive on a husky for me.
If I can get a healthy 50hp out of the DR just by making it breathe a bit better and a bit more fuel it will make the bike better for what I want to use it for. So for me the compromise of power vs economy, Power wins.

__________________
If you dont go, you will never know.
Blake Kennedy is offline   Reply With Quote
Old 11-16-2009, 01:18 AM   #29171
NordieBoy
Armature speller
 
NordieBoy's Avatar
 
Joined: Dec 2006
Location: Kiwiland
Oddometer: 7,063
Quote:
Originally Posted by Blake Kennedy
If I can get a healthy 50hp out of the DR just by making it breathe a bit better and a bit more fuel it will make the bike better for what I want to use it for. So for me the compromise of power vs economy, Power wins.
A healthy 50hp?

Even the 725cc kit won't get there.
NordieBoy is offline   Reply With Quote
Old 11-16-2009, 01:25 AM   #29172
DRjoe
Beastly Adventurer
 
DRjoe's Avatar
 
Joined: Sep 2007
Location: Sunshine coast qld
Oddometer: 4,769
whats the most hp a dr650 has produced
DRjoe is offline   Reply With Quote
Old 11-16-2009, 01:41 AM   #29173
LukasM
Beastly Adventurer
 
Joined: Nov 2006
Location: On a RTW ride - currently Central Asia
Oddometer: 5,330
Quote:
Originally Posted by DRjoe
whats the most hp a dr650 has produced
BSR-1 over on TT claimed that his DR is the strongest, I think he got just over 50 RWHP. That's with a big bore kit though, I think 700cc?

The best 644cc DR I have seen belongs to a Swedish guy, he got 48 RWHP with bolt ons (cam, HC piston, full exhaust, TM40, etc).



__________________
RTW trip blog: https://www.facebook.com/AroundTheWorldWithLukasM
LukasM is offline   Reply With Quote
Old 11-16-2009, 02:23 AM   #29174
Blake Kennedy
Tassie devil
 
Joined: Nov 2009
Location: Tasmania, Australia
Oddometer: 30
Quote:
Originally Posted by NordieBoy
A healthy 50hp?

Even the 725cc kit won't get there.
Crank HP guys
Husky has 53 Crank HP
__________________
If you dont go, you will never know.
Blake Kennedy is offline   Reply With Quote
Old 11-16-2009, 02:42 AM   #29175
Off Limits
Banned
 
Off Limits's Avatar
 
Joined: Jun 2009
Location: Camp Snoopy
Oddometer: 3,266
trippin 50hp. go buy a cr500! or get a 20hp nitrous kit!
Off Limits is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 03:45 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014