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| Thunderbird Twin - Technical Talk Technical talk for the big Thunderbird twin |
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10-03-2009, 12:34 PM
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#1 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Hmmm? Tough one.
Join Date: Jul 2006
Location: Oklahoma City
Posts: 518
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Maintenance update
Took the Bird in for 500 mile service and to have the following issues addressed.
Coolant leak - same problem as others and was repaired by re-torquing bolts
Hard start prblem (hot or cold) - o-ring gasket for fuel pressure regulater was not installed properly. o-ring was still good and reused. Problem was that when ignition key is first turned on the fuel pump is suppose to pressure up the fuel lines up to 35 psi and maintain (prime system). Well with the o-ring tweaked the pressure would bleed off and there would not be enough fuel for starting without cranking over and over.
Chirp (squeal) from rear end - belt was too loose, apparently belt is to be fairly tight with little to no slack.
All repaired in a day and Triumph's short mufflers installed. Those that have installed the short mufflers say that they are not much louder than stock. Well, I disagree, at idle sure not much louder than stock at all but, when under load and with throttle craked open it wakes up nicely. To me it's perfect you can now hear the exhaust, and it sounds good (not a muffled sound like stock) but it's not too loud especially cruising down the road. There is no drone at any speed while cruising. I like them and they look good too, plus you can now have access to the rear pulley to clean it. Which by the way is not easy to clean, try "Goo Gone" it woks great and gets the road grime and break dust off with ease. Also, the bird now breaths easier at all rpms and seem more relaxed at higher rpms.
Well, that's it, now to put some more miles on her before the Big Bore kit arrives which should be just about the time it turns cold here and I won't mind being without the Bird for a while.
__________________
Other bikes: 2005 Thruxton with 904 Wiseco big bore kit, BC stage one cams, CR carbs & BC Predators, 2010 Husaberg FE390, 2010 Triumph Thunderbird 1700, 2009 Kawaskai ZX-6R, 2011 Kawasaki Ninja 1000.
Last edited by OKCTriple; 10-04-2009 at 03:42 PM.
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10-03-2009, 01:07 PM
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#2 (permalink)
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Lifetime Premium
Site Supporter Formula Extreme Favourite Bike: Triumph Thunderbird
Join Date: Jun 2009
Location: Northern Virginia - USA
Posts: 633
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Nice report OKC. Good information on the hot/cold start issue. I only have slight difficulty on cold starts and a quick blip on the throttle remedies that. I'm hoping that when I get the BC pipes and tune the cold start issue will go away.
I'm really looking forward to your and Thatch's report on the BB kit. I want to get it, but haven't pulled the trigger yet.
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10-03-2009, 01:21 PM
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#3 (permalink)
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Senior Member
Commentator
Join Date: Jun 2005
Location: L.A., Ca.
Posts: 8,846
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Little to no slack?! I hope they know what they're doing, as that sound awful tight even tho theres no way to quantify that staement as far as how much or little slack. But i may have to tighten mine a bit and see id that helps. I really don't like the chirp, even if this bike IS a bird.
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10-03-2009, 01:46 PM
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#4 (permalink)
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Senior Member
Commentator
Join Date: Jun 2005
Location: L.A., Ca.
Posts: 8,846
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Wow, they were definatly right to some degree. I looked in the manual and with 10 Lbs of pressure against the belt it's supposed to give .25". Mine moved about 1" with finger pressure that was probably a few ounces ! And it was much looser than when i first got the bike and pressed on it. So i just adjusted it and will report back after a ride.
Chirp is gone, excellent ! This is one of those things for which we should have some sort of tech vault for so people could look up a subject such as the final drive and read about the chirp and what causes it, how to adjust the belt W/O a tool, etc. By the way, it's pretty easy to adjust w/o a tool. It's not a real narrow tolerance obviously of the bike would have thrown the belt or something being as loose as it was. All you do is push on the lower side of the belt and see how much pressure it akes to move it a given amount. Knowing that 10 Lbs of pressue is supposed to move it 1/4", you can get close. Mine is still somewhat loose, but i'd rather have it slightly loose than too tight. i just puhed till i felt i was pushing what would move a 10 Lbs weight and looked at how much the belt had moved at that point. I ended up with the belt feeling about like it was when the bike was new. In 4k+ miles apparently it stretches enough to require adjustment, but i imagine it's probably because it's a break in period and probably won't stretch much after this.
Last edited by dazco; 10-03-2009 at 04:54 PM.
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10-03-2009, 05:30 PM
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#5 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Thunderbird 1700 Big Bore
Join Date: Oct 2008
Location: UK
Posts: 431
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I had my service yesterday as well, check you oil again after 20 miles. Even though my dealer filled mine to maximum at the service and took it for a quick run mine had dropped below minimum again when I checked today, they told me that these engine seem to take a while to fully circulate, also what oil did you have put in ? I Had Motul 7100 10w40, More expensive but worth it, and it's red, easier to see on the dipstick.
As for the belt when I did my tyre I took measurements and in front of the bolt closest to the engine for the belt cover I could not deflect the belt more than 1.5cm, and to do that took some force, I was shocked how tight it was meant to be, mind no diferent to a cam belt on a car really.
EDIT: I meant to also post, me mech told me a little secret, you don't need the tool to measure the belts tentioning, in the lower plastic belt guard triumph have built in a measurement slot, however when they fitted the exhuasts to the bike they did not realize that that block view of this slot. This was only found after the bike went into production, so to get around this they had to relese a tool so it could be done with out removing the exhaust, the tool triumph use is identical to the Harley one as well as it's based on the Gates one . He was told this on his BB kit training.
__________________
Thunderbird 1700cc Big Bore - There's No Replacement For Displacement
Last edited by mad_angler; 10-04-2009 at 12:04 PM.
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10-03-2009, 05:43 PM
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#6 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Thunderbird 1700 Big Bore
Join Date: Oct 2008
Location: UK
Posts: 431
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Edited above post
__________________
Thunderbird 1700cc Big Bore - There's No Replacement For Displacement
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10-03-2009, 05:52 PM
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#7 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Hmmm? Tough one.
Join Date: Jul 2006
Location: Oklahoma City
Posts: 518
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Quote:
Originally Posted by hypervista
Nice report OKC. Good information on the hot/cold start issue. I only have slight difficulty on cold starts and a quick blip on the throttle remedies that. I'm hoping that when I get the BC pipes and tune the cold start issue will go away.
I'm really looking forward to your and Thatch's report on the BB kit. I want to get it, but haven't pulled the trigger yet.
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I hear ya Hype, I don't blame ya for waiting for one us to see how well it works. I am actaully looking forward to the weather turning cold, just because when it does the bird will getting a new heart and soul.
Based on what I have read about other's cold start issues before and after the TOR tune is installed I bet you're right and that tune is the key.
__________________
Other bikes: 2005 Thruxton with 904 Wiseco big bore kit, BC stage one cams, CR carbs & BC Predators, 2010 Husaberg FE390, 2010 Triumph Thunderbird 1700, 2009 Kawaskai ZX-6R, 2011 Kawasaki Ninja 1000.
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10-03-2009, 05:55 PM
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#8 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Hmmm? Tough one.
Join Date: Jul 2006
Location: Oklahoma City
Posts: 518
|
Quote:
Originally Posted by dazco
Wow, they were definatly right to some degree. I looked in the manual and with 10 Lbs of pressure against the belt it's supposed to give .25". Mine moved about 1" with finger pressure that was probably a few ounces ! And it was much looser than when i first got the bike and pressed on it. So i just adjusted it and will report back after a ride.
Chirp is gone, excellent ! This is one of those things for which we should have some sort of tech vault for so people could look up a subject such as the final drive and read about the chirp and what causes it, how to adjust the belt W/O a tool, etc. By the way, it's pretty easy to adjust w/o a tool. It's not a real narrow tolerance obviously of the bike would have thrown the belt or something being as loose as it was. All you do is push on the lower side of the belt and see how much pressure it akes to move it a given amount. Knowing that 10 Lbs of pressue is supposed to move it 1/4", you can get close. Mine is still somewhat loose, but i'd rather have it slightly loose than too tight. i just puhed till i felt i was pushing what would move a 10 Lbs weight and looked at how much the belt had moved at that point. I ended up with the belt feeling about like it was when the bike was new. In 4k+ miles apparently it stretches enough to require adjustment, but i imagine it's probably because it's a break in period and probably won't stretch much after this.
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Good job Daz, I too went straight to manual and checked it out I checked the belt tightness after talking with the tech and it seemed tight to me as well. However, it's about where the manual describes. Can't help but think most of them are coming out of the factory a bit loose and should be tightened during the PDI process.
I like your idea about a tech vault, just list the prolem as the title and then a quick blurb to describe the problem in detail and then post what the fix was to remedy the problem.
__________________
Other bikes: 2005 Thruxton with 904 Wiseco big bore kit, BC stage one cams, CR carbs & BC Predators, 2010 Husaberg FE390, 2010 Triumph Thunderbird 1700, 2009 Kawaskai ZX-6R, 2011 Kawasaki Ninja 1000.
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10-03-2009, 05:58 PM
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#9 (permalink)
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Senior Member
Formula Extreme Favourite Bike: Hmmm? Tough one.
Join Date: Jul 2006
Location: Oklahoma City
Posts: 518
|
Yep, Mad is right, I remember now during delivery the service guy telling me how to check the belt tension. I need to go out and look but since I put the short mufflers on I bet I can now utilize the slot to check belt tension.
Quote:
Originally Posted by mad_angler
I had my service yesterday as well, Dazco check you oil again after 20 miles. Even though my dealer filled mine to maximum at the service and took it for a quick run mine had dropped below minimum again when I checked today, they told me that these engine seem to take a while to fully circulate, also what oil did you have put in ? I Had Motul 7100 10w40, More expensive but worth it, and it's red, easier to see on the dipstick.
As for the belt when I did my tyre I took measurements and in front of the bolt closest to the engine for the belt cover I could not deflect the belt more than 1.5cm, and to do that took some force, I was shocked how tight it was meant to be, mind no diferent to a cam belt on a car really.
EDIT: I meant to also post, me mech told me a little secret, you don't need the tool to measure the belts tentioning, in the lower plastic belt guard triumph have built in a measurement slot, however when they fitted the exhuasts to the bike they did not realize that that block view of this slot. This was only found after the bike went into production, so to get around this they had to relese a tool so it could be done with out removing the exhaust, the tool triumph use is identical to the Harley one as well as it's based on the Gates one . He was told this on his BB kit training.
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__________________
Other bikes: 2005 Thruxton with 904 Wiseco big bore kit, BC stage one cams, CR carbs & BC Predators, 2010 Husaberg FE390, 2010 Triumph Thunderbird 1700, 2009 Kawaskai ZX-6R, 2011 Kawasaki Ninja 1000.
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10-03-2009, 06:18 PM
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#10 (permalink)
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Senior Member
Commentator
Join Date: Jun 2005
Location: L.A., Ca.
Posts: 8,846
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You mean theres a mark on some part to determine how far the belt was pushed when you test it? because if thats the case, it's really not very important because it's easy enough to see approximately how much you pushed it. The more important thing which is far harder to judge is how many pounds of pressure you applied to it. But even that seems to me easy to estimate and get close. Since my chirp is gone it's obvious it's not too loose because it's chirped to some degree since i got it. So it's now adjusted better than the factory had it obviously. One thing i did notice is that the chirping has gotten worse over time, so when you mentioned that being associated with the belt being too loose i realize mine must be in desperate need of adjustment, and surely enough it was. Thanks for bringing this up otherwise i may have ridden that belt right into the history books !!!
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