Yamaha TDM Riders

To those that responded regarding my mystery "fuel" delivery issue .....

Yeah ... It's the fuel pump. To make a long story short, with testing it out with specific volumes of gas in the tank .... I.E. - if I siphoned a bunch of gas out, she labored, hard. On a full tank, if I got down to around 1 gal., or a little less, of gas in her, she had problems, basically - by my calclations, around 120 some odd miles .... this going off of when she had 86 miles on her, and then I was in a foot cast for 7 weeks. and starting her a bunch of times, relative to the length of time if took me to get to work, etc ... so if anything, 120 to 130 miles ........ and she labored even with the choke all the way out. I put the gas back in, and 1-2-3, she's back to normal.

I repeated this test 3 times over the weekend, and the results were all identical ......

What else could it be other than the fuel pump? I mean, it is 13 years old ..... and correct me if I'm wrong, but isn't the stock fuel pump gravity fed ????????

Those that replied thought it could be the fuel pump, and suggested replacing it with an electric one.

Thoughts, oppinions, and suggestions .......

G.

The fuel imput is on top of the TDM carbs, which sits higher that the lowest part of the tank. The fuel petcock and pump set way below. It probably would gravity feed a portion of the fuel from the tank but not all.
The pump is a simple diaphragm type, with the diaphragm separating the vacuum side from the fuel side and looks simple to replace, except I don't think you can get a kit. The pump is around $90. If there was a tear in it, not only would the pump quit working and rely on gravity to feed the carbs but the vacuum is connect to the base of one of the carbs and would suck gas into the intake upsetting the fuel mixture and run rich. I question wether the pump is adequate even new.
IMO An electric pump makes the TDM run even better. These are on Ebay all the time: http://cgi.ebay.com/ebaymotors/99-00-01-02-Yamaha-YZF-R6-Fuel-Pump_W0QQcmdZViewItemQQcategoryZ35620QQihZ008QQitemZ180018900725QQrdZ1QQsspagenameZWDVW

Expect to pay $20-35 for one and another $5 for a relay. It is a cheap fix.

Sometime we overlook the obvious, check the vacuum line to the pump for tears, kinks, or softness than may collapse under pressure. All would disable the pump.

Has anyone made or seen a Bellypan to suit the later TDM900's ??
View attachment 98258
Be interested in buying one.

A lot of info at Carpe-TDM. Just do a search here:
http://www.carpe-tdm.net/ipb/index.php?act=idx

Here's the linky dink with all the fun

http://www.advrider.com/forums/showthread.php?p=3920129

Here's a pic of my '93 TDM850. I ride this bike all year round as my main transportation to work. I ride 140 miles round trip and I can't think of a better bike to do this on!

For what it's worth (i.e. for cosmetic results rather than protection, as it turned out) I've posted a pic of a Powerbronze bellypan fitted to my 2004 vintage TDM 900 here

As you can see, though, there is only 4-6 inches ground clearance - typical of these things, so strictly for fairly civilised surroundings.

Probably the best fitment would be the Puig (German) one, as obtainable routinely on eBay (e.g. current item 160069424239): search "bugspoiler".

The 900 is a great bike for touring, yet slender enough and with plenty of low-rev torque, for use in city traffic. Handles well on twisty roads, too, and the fuel consumption is excellent - take it from a Scot! And with "sporty" cans (check this soundbite out with the volume turned up) and verified speeds of at least 130-140 mph (UK - our miles are a whisker smaller than US?), sure sporty enough for most....

Sad you guys in the US are denied the pleasures of the 900, while the rest of us have all the fun

Why that's a mighty nice TDM you have there, Mr. Pict

Hi just joined this group, from Uk got a 2000 TDM850 Mk2 silver/grey 37k miles

Thanks for the compliment! Mine doesn't see anything but hard UK roads, but for more general pictures around the world, see the Carpe TDM site or the photo collection from current and previous club calendars etc.

Hi....just joined up courtesy of twinrider's post in Carpe TDM.

Two of us had a fairly big Euro tour last year on our TDMs, on asphalt I have to admit but there was around 100 miles of offroad, laden with touring luggage .
The route tok us from the UK to Venice via the Alpine Stelvio Pass, ferry to Corfu and back to the UK via greece, Bulgaria, Romania, Hungary, slovakia, Poland, Czech Rep. Germany Holland and Belgium. Around 5000 miles..........one of the best trips I've done

Pics here: http://uk.pg.photos.yahoo.com/ph/citroen54/my_photos


2003 TDM900

G'Day Pict & Dandy

Started getting you interested in the "Dark Side" of TDM Adventuring have we?

I've been waving the flag for some time with my Adventure Ride Reports


Cheers


MB

Masterbrewer, Pict, & Dandywarhol. I recognize you all from CarpeTDM, http://www.carpe-tdm.net/ipb/index.php?&&CODE=00.
Damn good site & the best / only one for TDM's I ain't been there for a while, but I intend to be back! Good to see ya here.

Preach it Brother! BMW is just now figuring out that a parallel twin 800cc bike is a good idea. Yamaha figured that out back in the early 90's. Your bike looks just like my 93'. See my pictures earlier in this thread. Here is another picture of me and my 93' 850 at the Grand Canyon last July.

Howdy Tom S!

The former owner of my TDM & a friend, spent a lot more time than I riding with other friends that have Beemer 1100 & or 1150 GS's. On some long trips. He is a big guy too. Anyway, more than one of the GS guys told me, "That thing hauls ass!" 'Cause it went right by them.
Yamaha should still sell them here. I think they would have a better market for them now, as opposed to '92-'93. Hell, Buell/HD saw the light & sells the Ulysses. Maybe the only bike that could replace the TDM for me. Not a Beemer.

Yep im on carpeTDM aswell,so hello to you all

Hi Tom Good to see you again - been hibernatin' up there? Nice TDM testimonial - time Yamaha woke up to the US - is their Marketing department asleep? Globally the big multipurpose twin is on the rise again, but driven by other manufacturers, and US territory is ripe for these things, so...?

Hello to aytcat and the rest of the Carpe bunch too - budge over, the rest of you ADV Riders, we deserve some space.

Any one in the US got one of these for sale. I'm still looking.

Iv just had my valve shims checked at 37K miles ,yea i know it should of been done at 28K but there are reasons for that being missed,
All Inlet valves were in tolerance and one exhaust valve,the other three were out but the inside left hand cylinder exhaust valve was way out.
The camchain was slightly worn but the mechanic said nowt to worry about and the carbs were balanced aswell
cost of 3 shims were aprox in UK = USA $. $17.25, coolant $10,Labor $210 total of $237.25
I was expecting them all to be out of tolerance on the valve shims but was surprized to find inlet valves were ok.