MJWHITT Posted October 30, 2011 Report Share Posted October 30, 2011 Im on doing a rebuild on a Ducati 998FE, ive had the frame powder coated and while the engine was out ive decided to change the belts. Ive got the bike built up and tried to start it but it just wont go. Its trying and sounds like it might go then it stops firing and turns over and over. It sometimes back fires. It stinks of petrol. It is sparking but not all the time. Ive never done the belt change myself on previous ducatis ive owned but me and a mate ( whos done loads on cars has his own garage) decided to have a go. I was sure we did it ok but now after checking everything else im doubting myself.. Anyone shed any light on this? Does it sound like the timing is possibly out? Anyone help with where the timing marks should be and ill check it or take them off and try again... Any help would be appreciated Thanks Link to comment Share on other sites More sharing options...
srad34 Posted October 30, 2011 Report Share Posted October 30, 2011 Im on doing a rebuild on a Ducati 998FE, ive had the frame powder coated and while the engine was out ive decided to change the belts. Ive got the bike built up and tried to start it but it just wont go. Its trying and sounds like it might go then it stops firing and turns over and over. It sometimes back fires. It stinks of petrol. It is sparking but not all the time. Ive never done the belt change myself on previous ducatis ive owned but me and a mate ( whos done loads on cars has his own garage) decided to have a go. I was sure we did it ok but now after checking everything else im doubting myself.. Anyone shed any light on this? Does it sound like the timing is possibly out? Anyone help with where the timing marks should be and ill check it or take them off and try again... Any help would be appreciated Thanks Hi, Its a straight forward job, you need to take off the plastic cambelt covers to start though so you can see all of the timing marks. There are loads of guides on the Ducatisti forum for cambelt changes. Half hour is time well spent chap. Link to comment Share on other sites More sharing options...
rc30sp1 Posted October 30, 2011 Report Share Posted October 30, 2011 i think you would be better trying for advice on a more specialised site try ducatisti.co.uk i hope you get sorted. cheers Link to comment Share on other sites More sharing options...
ronenige Posted October 30, 2011 Report Share Posted October 30, 2011 Hi, Its a straight forward job, you need to take off the plastic cambelt covers to start though so you can see all of the timing marks. There are loads of guides on here for cambelt changes. Half hour is time well spent chap. As the man says , easy enough to check and get right ( or wrong ) shouldn't affect it sparking tho' Link to comment Share on other sites More sharing options...
Frosty_The_Iceman Posted October 31, 2011 Report Share Posted October 31, 2011 Had the same problem after doing valve clearances and belts on my 996, it was the timing. Turns out the timing marks on the cylinder heads are in a different location on the vertical and horizontal cylinders, who knew? It turned over fine but wouldn't start, backfiring, etc. Try here Ducatitech Link to comment Share on other sites More sharing options...
MJWHITT Posted November 1, 2011 Author Report Share Posted November 1, 2011 Hi Thanks for the advice folks. Im going to take the bike to someone who knows a lot more than me and get the timing checked and get it put on a diagnostic. Ill update with what was wrong when (If) its sorted.. Cheers Link to comment Share on other sites More sharing options...
Superdunc Posted November 2, 2011 Report Share Posted November 2, 2011 Cam belt timing on Ducs is pretty easy the marks should be obvious. Have you had any of the engine parts painted or powder coated? the crank sensor, just in front of the water pump is quite sensitive to the correct clearance from the timing gear, it should have shims between it and the casing, if you've had the casing painted it can incrase the clearance and give an intermitant signal from the sensor. Try removing one of the shims and see if this fixes the problem, your aiming for 0.8mm- 1.0mm clearance. Link to comment Share on other sites More sharing options...
MJWHITT Posted November 3, 2011 Author Report Share Posted November 3, 2011 Thanks again folks I had the bike to ducati john today. The timing was 90 degrees out on the horizontal cylinder. He timed it up correctly and it started first time off asking. I dont no how we managed to get it so wrong? Im just well pleased i didnt do any damage. Yet again another great service fron ducati john, i cant sing his praises enough. He's worked on a few of my Ducatis now and ive come away a very happy customer. Hes very good at what he does and a good bloke.. Link to comment Share on other sites More sharing options...
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