No more difficult than what has been removed already. Just take the trumpets off and undo all the bolts around the outside. Oh yes, and pull the oil breather off. Well worth doing.
Update: So managed to get the air box off and you were all right (thank you), it's then about a million times easier to see what you are doing and where the linkidge goes and how it all works. I first gave the springs, cam and linkedges a blast with GT85 and that improved things a bit 3 out of 5 throttle openings would work and it would stick on the other 2. I then soaked the springs in penetrating fluid and scrubbed them out with the girlfriends toothbrush repeatedly blasting them with spray. Spring before: Spring after: I've also taken off the throttle cable at the grip and poured lube down the casing to make sure that is well maintained. Just waiting on gravity to do it's thing there. Though moving the throttle cam by hand is now free and easy, I've also lightly lubed the springs, so I'm hoping when I do it all up again it will be fixed. I just have to remember how to put everything back now :Wideyed:. This is all unchartered territory for me but deeply satisfying so far.
All good stuff then, but still a mystery if the stiffness happened suddenly? Definitely no signs of melted plastic/filter on top of butterflies and your ITG*is all intact when you look on the inside? Also routine-wise, trumpet 'springy retainers' are intact/not bent also? I know "one thing at a time "is often the best approach, but now is the time to change your fuel filter/ check your tank fuel hoses haven't started perishing if you haven't done it recently :smile: * apart from small fire risk, it is true that these one-piece filters are an improvement on the original but best of all is the B MC type its just that these are horrendously expensive (over £100 the pair) for what they are
So the lube has reached the end of the throttle cable so I've reconnected everything and set the tension to the point where the throttle cam starts to move then backed it off one bit. My fast idle button is now also working I've opened and shut the throttle over 100 times and it has not stuck once or changed in it's fluid feeling. It is snapping shut every time like I would expect it to. The bike is very new to me (last 3 weeks) but had very little use from the previous owner, 289 miles in 3 years to be precise. I think it's lack of use that's caused it to sieze up. With the air box off you could hear the gunk graunching away in the mechasnism as the springs did their job, the bottom one with the throttle cam was worse than the top one. As I worked them through with the cleaner etc things just got better and better so I think that is the conclusion. There is no evidence of any issues around any of the areas you mention above. Also the problem was still in place with the trumpets connected and got no better when I removed the ITG. With regard to the fuel filter this was replaced June 2014 and the bike has done about 40 miles with the previous owner and about 350 with me since then so assuming that would be ok still ? No budget for new air filters at the mo, but not looking forward to re-fitting the ITG........
Love it. Sounds like you have made excellent progress and when you get a good result like this its very satisfying. Fingers crossed on the road all is back to how it should be.
I'm sure it will be fine - too early to change filter as you said. No point going looking for trouble as in theory we are still Midsummer :smile: Re: perished hoses, you can research that one another time if necessary ditto air filter catching fire as this is a freak occurrence that only coincides when bike hasn't been serviced/is in a poor state of engine tune hence me questioning you about coughing/misfiring.
It's never coughed or misfired, it does have some hesitancy/flat spot at 4500rpm ish but I believe that is a common issue with these isn't it ? Just examined them and they look ok I can't see any evidence of any perishing....... Got to love older bikes eh ! Need to get some work done and will then try and put it all back tomorrow and then get a road test in tomorrow.
I got my BMC filters from E Bay Italy. I cannot remember the exact price but they were not much over £100 including post. Twas a fair while ago though
Yes, spot on with the hesitancy thing and it's well documented on this forum and many others. There used to be a chip available to convert to single injector as one route to a cure but many opposing views on this and best I don't comment in the long run.
Just checked the history and that ITG filter was fitted by pro twins in 2007. The bikes done 3k miles since then so it's probably due a replacement from time alone. It is in good condition though and still has a bit of oiliness to it. With regard to the hesitation is there someone that does custom mapping that sorts it, od does the ECU not have that capability on these 9x6 bikes ?
Well I'm tempted to just put it in the cup and not say anything, but I'm not brave enough tbh ! I expect I might have to purchase her a replacement. I'm even planning on putting the pillion seat and pegs I got with the bike on and giving her a lovely ride out on the 996, as that will be nice and comfortable and relaxing for her.......... She's a lucky girl really.
I would imagine that your ITG filter is washable so don't just throw it away, well done with what you have done considering its you first time under the tank. Steve
Best for custom mapping is CJS Ducati in Bristol. I have used them for several bikes. CJS RACING Ducati Cylinder Heads Tuning Gas Flow Dyno ECU Custom Mapping Bristol Bath
^^^ Thanks, job for next year I think........ So my throttle saga continues, now I have refitted the airbox I have the same issue again, remove the airbox and all working beautifully, with the airbox in place you can see it flexing very slightly as the top linkage catches it and stops the throttle motion. So whilst I have a lovely clean throttle linkage, cam etc I still have the same issue ! Any reasons why the airbox would be catching and why it might have just started.
The airbox should easily clear the throttle linkage, I can only think that a blowback or loose induction injector to stubs have caused the the injectors to rise up and foul the linkage. I would check to make sure the injectors sit on their stubs correctly and then follow the action through to make sure nothing is sticking. If it's the filter then replace it with stock filters or aftermarket in airtube filters.
so when you open throttle you feel a resistance and then at full throttle the action is easier and there is even a slight danger of throttle sticking at half open? I just carefully looked at mine (996) and closest point for linkage during throttle movement still has plenty of clearance at around 4-5 mm. I can see that your airbox looks to be a standard one but have you dropped bike/has there been any trauma on left side of bike recently/any signs at all? because carefully looking at your pictures with tank removed I can see (it appears) that whole airbox body is not sitting correctly/symmetrically and is displaced to the right and slightly to the rear from where it should be going by the witness marks for the trumpet sealing rubbers. These rubbers fill quite a void between airbox and trumpets/throttle bodies so they may not appear to be obviously out of place. Did all 6 airbox fixings line up ok/was there any sign of distortion or cracks? Just a long shot but if above is the case then it could have had the effect of reducing linkage clearance.
Fiendish observation Chris! Were you good at "Ask the Family" too? FM: check the throttle cable run between the airbox and frame to see where it is getting trapped. Is the routing correct?
