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Old 05-29-2012, 10:29 AM   #65071
Adv Grifter
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Location: Passing ADV Stalkers in California
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Quote:
Originally Posted by Motodeficient View Post
I thought that TM40 throttle pull was pretty stiff when I installed it last summer. I am used to it now I guess because I do not notice it anymore.
As I mentioned, I only spent an hour riding the TM40 equipped DR650.
I probably could have adapted but I just thought it was wrong ... and I knew riding it off road would wear on me over time/miles.

FIX?
Couldn't the return spring be swapped out for a lighter one? I've had two bikes with Keihin FCR carbs ... both light, easy throttles.

Also interesting to note that before F.I. came along ALL the Japanese motocross bikes ... and all KTM ... used the Keihin FCR carbs ... not the Mikuni TM40. In fact, I can't recall any OEM using the TM40 in years.

Wonder why?
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Old 05-29-2012, 11:03 AM   #65072
Mongle
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Location: North Carolina Y'all
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Quote:
Originally Posted by DockingPilot View Post
thanks for all the feedback fellas.
the cables are routed correctly and the throttle snaps back as it should. its just after the eighth hour or so in the saddle i really start to notice it. the last 60 miles home was slab and just holding the throttle open for a good hour was wearing me down. even though i dont like them i would have done almost anythingfor a throttle rocker at that point.
guess i better start squeezing a tennis ball in my spare time. lol

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Having broke my right wrist being dumb as a chump, all day rides give me wrist pain. I bought something like this. Mine has velcro on it so I could get it on and off with the bark busters. Works great for the long slab rides and comes right off when you get in the trails.

(this isn't a pic of mine...just found it on the interweb to give you an idea)


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Old 05-29-2012, 11:17 AM   #65073
Tech23
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Quote:
Originally Posted by Adv Grifter View Post
As I mentioned, I only spent an hour riding the TM40 equipped DR650.
I probably could have adapted but I just thought it was wrong ... and I knew riding it off road would wear on me over time/miles.

FIX?
Couldn't the return spring be swapped out for a lighter one? I've had two bikes with Keihin FCR carbs ... both light, easy throttles.

Also interesting to note that before F.I. came along ALL the Japanese motocross bikes ... and all KTM ... used the Keihin FCR carbs ... not the Mikuni TM40. In fact, I can't recall any OEM using the TM40 in years.

Wonder why?

You answered your own question in your post. All the motocross race bikes do come with the FCR. These bikes are high revving race bikes, the DR isn't. They also benefit from the additional adjustability because these bikes compete at tracks all around the country at different elevations and different soil/sand compositions. The FCR is a great carb no doubt just kind of overkill for the DR. You can use an atomic bomb to kill a fly...but you know a fly swatter will work just as well.

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Old 05-29-2012, 11:53 AM   #65074
KaaJa
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Tm40 throtle returning spring is adjustable, take closer look and you will notice it. There are at least three different positions.
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Old 05-29-2012, 12:04 PM   #65075
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I asked procycle about that, they said they ship with the lightest throttle pull already enabled.
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Old 05-29-2012, 01:21 PM   #65076
kobukan
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Quote:
Originally Posted by Adv Grifter View Post
Couldn't the return spring be swapped out for a lighter one?
I would think so, but I'd really like to know for sure. Anyone know?
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Old 05-29-2012, 02:16 PM   #65077
dljocky
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Can we get a few pics of your setup?
Thanks


Quote:
Originally Posted by Mongle View Post
Having broke my right wrist being dumb as a chump, all day rides give me wrist pain. I bought something like this. Mine has velcro on it so I could get it on and off with the bark busters. Works great for the long slab rides and comes right off when you get in the trails.

(this isn't a pic of mine...just found it on the interweb to give you an idea)


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Old 05-29-2012, 02:55 PM   #65078
NordieBoy
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Quote:
Originally Posted by acesandeights View Post
Just wanted to say, 80% worn trail wings kick ass on single track that's been in the shade for the last six months with only a few weeks of melted snow on them. Yeah, completely wet, completely muddy, deep sink holes are no match for trailwings! Or, at the end of all this I mean to say, don't take the trailwings off paved roads...you've been warned!
They work well in snow though.
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Old 05-29-2012, 02:57 PM   #65079
DockingPilot
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Quote:
Originally Posted by kobukan View Post
I would think so, but I'd really like to know for sure. Anyone know?
When I ask about the different spring positions PC didnt know anything about them. Which I thought was odd.
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Old 05-29-2012, 02:58 PM   #65080
NordieBoy
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Quote:
Originally Posted by Adv Grifter View Post
In fact, I can't recall any OEM using the TM40 in years.
[/I]
Wonder why?
Harley?
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Old 05-29-2012, 03:53 PM   #65081
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The CrampBuster works well when hands on but I opted for http://www.amazon.com/2Wheel-Ride-GC...8331587&sr=8-1 which allows you to go hands off if you want. Enough friction to hold it open but easily overcome if you want to shut it down. Easily removeable and fits in your pocket.
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Old 05-29-2012, 05:01 PM   #65082
procycle
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Quote:
Originally Posted by DockingPilot View Post
When I ask about the different spring positions PC didnt know anything about them. Which I thought was odd.
Dunno who you talked to. We all know about it. As was mentioned earlier setting the spring to the lightest position is one of the many things we do to modify the TM40 for DR650 duty.
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procycle screwed with this post 05-29-2012 at 05:07 PM
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Old 05-29-2012, 05:16 PM   #65083
ADV8
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After reading some of the posts this morning I have to ask,folk realise the FCR Keihin flat slide has been around for close to 20 years,right ?
It has been the king pin carburetor for a long time.
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Old 05-29-2012, 05:25 PM   #65084
ADVwanaB
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12 volt power source

Where is the 12 volt power source i have heard of behind the headlight?
What color wires in what harness?
Thanks.
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Old 05-29-2012, 05:34 PM   #65085
ADV8
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Quote:
Originally Posted by ADVwanaB View Post
Where is the 12 volt power source i have heard of behind the headlight?
What color wires in what harness?
Thanks.
Its the only two wire and plug doing nothing so easy to spot.
It might have been Brown and a Black/White.
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The person who got you the billet DR650 third gear set, you're welcome.
49 Sunbeam S7 Deluxe-57 TR6 Trophy-68 Huskys x 2-71 Commando Fastback-73 Ducati 750GT-73 Eldorado-74 TR5T x 2-74 Commando Roadster-73 and 74 H2A/B-77 and 81 900SD's-86 400WR-98 TL1000S x 2-08 DR780-07 Ducati HM 1100S
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