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Old 12-31-2015, 12:08 PM   #1
Tojo92
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New Project for Mongo - 1999 Triumph Sprint ST

In an effort to add some motorcycle discussion to MH, I thought I'd share a new project.

I have a little problem with (Bike Attention Deficit Disorder (B.A.D.D.) and picked up a slightly neglected 1999 Triumph Sprint ST as a little project.

12391180 10207008062573637 6771521406126354965 n?oha077082e9bde42fdd14fbbfdec746d1f&ampoe57496997

38,000 miles, 5 year old tires, grease build up in all the usual places. Maintenance has been "deferred" and obviously this bike was used as a commuter appliance and not loved.

I'll add updates from time to time.

Happy New Year.
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Old 12-31-2015, 02:32 PM   #2
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Beautiful color! Do I detect a fondness for the red shiny ones?
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Old 12-31-2015, 02:36 PM   #3
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Pretty much any color as long as it's on two wheels. I have a problem, but I am self aware.

:-)
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Old 01-01-2016, 11:22 AM   #4
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Old 01-01-2016, 11:50 AM   #5
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So, to start off, I took all the body panels off to clean everything up.

Note: Triumph plastics of this era are very thick and solid; they can be brittle. While taking off the tail section, I snapped the rear right tail section off at the front dart tab below the tank and at the rear. I also made the error of thinking the rear would have a little give in it to slide off the tail section...NOPE, snapped the same piece at the rear as well. I am going to repair this, but in the mean time I located a replacement for $67 bucks and ordered it. That was pure dumb luck, but I'll take it.

This thing is covered in road grime, it is clear it served the commuter use in all conditions. I set those aside for a good cleaning once the mechanical items/service issues are gone through.
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Old 01-01-2016, 11:59 AM   #6
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I approve of this build and can relate to the effects of B.A.D.D. I loved my Daytona 955 and often consider picking another one up. The triple is one of the best all around motors ever built. I will subscribe to this thread.
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Old 01-01-2016, 12:17 PM   #7
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Thanks EK.

It's not really a build; I don't have those skills. More of a re-freshen, check up, make better, and ride for a while effort.

I've owned a Steamer Triumph and a 1999 Speed Triple in the past. Motors are amazing. I'm a fan.
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Old 01-01-2016, 12:37 PM   #8
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Maintenance items.

Fresh Triumph air filter, then off with the airbox and in with new spark plugs. Also did an oil change (Actevo 10W40) and new Triumph filter. Oil was dark but no metal evident.

If you buy a Triumph, you will need some special items.

Shared from a Triumph Website - accurate as per my recent experience.

http://www.triumphnet.com/st/faq/

Fuel Tank removal*- Torx T30 and 4mm Allen
Fairing Removal*- 5mm and 6mm Allen
Front Tire*99 models - 15/16 inch socket (or 24mm)
Torque axle to 61Nm - pinch bolts to 20Nm
Front Caliper mounting bolts*- Torx T55
Torque to 40Nm
Rear Wheel*- 1 13/16 inch socket (or 46mm)
Torque to 146Nm
Oil Drain Plug*- Torx T50
Torque to 25Nm

Torx T50 and T55 used for many engine, frame and suspension mounts

After putting it "mostly" back together to run it, I had an engine light on... IT.

After thinking I may have missed something, I disassembled to check all connections. All good, although there were two connections off the wire harness that weren't plugged in to anything. Normal and not an issue. Bike back together...still had same light on.

After checking the interwebz, I found that I probably set the code light off by turning the key on while the bike was apart. According to info I found, the engine management system will clear a code if you start the bike and let it idle for about 15 minutes (until the fan kicks in) without touching the throttle then shut it off. I did this a few times but the code never cleared.

Finally figured out it could be the battery, so a night on the tender and repeat. All clear! Good to go. Battery is fine, it just needed a little tender time.

Great that you can reset the system by doing this. It also recalibrates the fuel system if you have had a serious variation in fuel quality. These bikes run a little rich, but that is NOT a problem in my mind and much better than running lean.

Next up - tires and brakes.
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Old 01-01-2016, 01:33 PM   #9
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Yup these bikes do some wonky stuff with low voltage. I miss my tona dearly.
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Old 01-01-2016, 01:46 PM   #10
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Tires and brakes: The Triumph websites seem to favor PR3's or PR4's. I went ahead and went with Bridgestone S20 EVO's. I doubt they will last as long as the PR4's, but I'm ok with more frequent tire changes AND I also run S20 EVO's on the Duc.

I love the Single Sided Swing Arm. I had my SSSA stand left over from my 1999 Speed Triple, so that was handy. To take the rear tire off, I had to take off the exhaust and then it is a simple 46 MM castle nut, a conical spacer to center the wheel, and two washers. Rear caliper stays put. In this case, I had to work a bit to get the wheel off due to the washers not wanting to release. There was some evidence of someone prying on the outside washer.

Not sure, but pretty sure it was just road grime and a lack of grease on the spindle from the last change causing this. I went ahead and cleaned all the parts with some Scotch brite and elbow grease. I added a light coating of grease for future changes. While the wheel was off, I tackled the grease/chain wax build-up on the chain, rear swing arm, and surrounding areas. This took hours of cleaning. I found WD-40 worked well to dissolve the build up. I really wish I had taken "before" pictures.

I also went ahead and inspected and adjusted the chain as it was loose. I thought I needed to replace the chain until I cleaned it up. No tight spots. It is in good shape as were the sprockets.

The counter sprocket cover had such a thick layer of crud all up in it that it was PACKED solid. All better now.

While the wheels were off, I cleaned the calipers and added new front HH brake pads (FA236HH x2). The rear brake pads and calipers were cleaned, but I didn't replace them. They show wear as expected but still have decent life left.

One and a half cans of non chlorinated brake cleaner, about half a can of WD-40 and about four old t-shirts used in cleaning up these few sections. Satisfying to see it all cleaned up and in good shape.

The Triumph comes with Stainless Steel brake lines as factory, so I'll swap out the brake fluid for some RBF600...just because.

One last little quirk about these. The PO added a shift lever off of Yamaha dirt bike. Seems odd, but works well. The stock set up have a tendency to wear and get sloppy. This solution works well and is a good fix as it is difficult to find parts needed for replacement from Triumph.

A quick test run shows a very solid handling bike. I assumed I would need to add heavier springs but the suspension feels pretty good even for my weight. It's possible the prior owner added heavier springs, but I'll get with Roger at On-Road Off Road to give me a double check.
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Old 01-01-2016, 08:10 PM   #11
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Beauty, subscribed!!
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Old 01-01-2016, 08:55 PM   #12
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coming along nicely
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Old 01-02-2016, 03:14 AM   #13
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That 955 triple pulls like a champ from just north of idle all the way till redline. You are never in the wrong gear to start a pass on the highway. My bike gets about 45 mpg consistently. The engine management light is very picky and will probably come on occasionally for seemingly no reason, but happens most frequently when the battery is disconnected or the fuel level is low. It should usually clear after 3 complete heat cycles. Let me know if you have any other questions, I own a 2002 Sprint Ride Smart.
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Old 01-02-2016, 01:00 PM   #14
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Helpful link for other Sprint owner. ST and Ride Smart.

http://members.iinet.net.au/~vine/Tr...ual%201999.pdf
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Old 01-02-2016, 03:40 PM   #15
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I have a friend that has the cables and software to modify the ecu for performance or milage if you ever want to get it on a dyno. He had my old Daytona screaming.
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Old 01-02-2016, 09:45 PM   #16
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I'm sure interested. I was looking into buying the pc connection and software. If he has it, it may be just as cost effective.
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Old 01-02-2016, 10:22 PM   #17
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Quote:
Originally Posted by Tojo92 View Post
I'm sure interested. I was looking into buying the pc connection and software. If he has it, it may be just as cost effective.
I will get in touch with him and see if he still has it. I'm sure he does.
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Old 01-03-2016, 08:32 AM   #18
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As part of my standard practice, I usually start the bike up, test ride it after fluid changes, give it a good cleaning, and then park it for a while in one spot to then go back and check for any possible leaks.

Small drop of water from water pump. Checking the weep hole area and all hose connections show no leakage. Looking up more on the interwebz, it looks like it could actually just be a simple gasket replacement. Only one or two drops of evidence on garage floor and one drop hanging from bottom of cover.

Seems many have had the same and actually just leave it and consider it a Triumph oddity! Never had this issue from any of me other triples (that I noticed anyway).

Hopefully a simple fix and not really a huge issue, but might as well knock it out before putting the fairing back on.

Just for grins, I'm going to pick up a new chain. The current one cleaned up fine, but for piece of mind, and the fact I plan on covering some decent mileage soon, I figure it is cheap insurance.
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Old 01-03-2016, 09:21 AM   #19
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Any chance that coolant hose is the original from 1999?

If so, you might want to change it before embarking on any road trips - looks kind of bulged out after the clamp...
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Old 01-03-2016, 10:02 AM   #20
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Fuel and coolant hoses changed by PO in 2010 along with adding metal clips for gas tank lines. It looks goofy on the picture, but not so much in person.

Good point though, I'll inspect them all a bit more closely.
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