Hello everyone,
After many track days my 1098R decided to crack a piston. I was lucky and nothing else was damaged. Got the motor out took the heads and cylinder out. I use Motul 300V 15-50 and I change oil every track day so about every 2h. Finally got to see the merits of changing oil in overkill mode. Every bearing is flawless including tranny and the crank shaft had 0 wear on it. Thats with 21 000km on it with half of those at track days running a pretty good pace. Now the reason for the cracked piston is still beyond me. When I took the cylinder off the ring were clocked in line. We figured the bypass compression blew oil in the air box and the top piston sucked it all in……oil everywhere inside and out at the track NOT GOOD. I felt it right away of course power was down. Compression test was at 60 after.
Cheapest option was to go with Pistal pistons as the price of one from Ducati is the same as 2 from Pistal. So I went that route. At that stage we took the valves out to make sure nothing touched and while at it since from factory the valves only have one angle on them we did a 4 angle valve cut on the heads witch gave a 5% increase in flow.
So now I got all the parts put back together and we find from factory the top piston cam timing was off 12 degrees ( wow ) and botton 7 degrees. So we had that adjusted and are now .5 degrees off from one another so a lot better.
Time to put I back in and of course after all that it runs horrible. Misfire all the way. I took a few days off from it because I could not figure out what was going on. Everything was in the right place. Played with it again going over the wires and it was only condensation in the coil plugs. Harness sat on the cements floor for about 2 weeks so maybe it’s that.
Now the bike idles very strong and is very responsive. Tried it out back slowly after doing 5 heat cycles and first impression that it going to pull like crazy. Response is better and torque is up for sure just going at 3k rpm it pulls my arms off.
Dyno tuning is set for July 15 so I will post the results once done.
Thanks
Etienne
After many track days my 1098R decided to crack a piston. I was lucky and nothing else was damaged. Got the motor out took the heads and cylinder out. I use Motul 300V 15-50 and I change oil every track day so about every 2h. Finally got to see the merits of changing oil in overkill mode. Every bearing is flawless including tranny and the crank shaft had 0 wear on it. Thats with 21 000km on it with half of those at track days running a pretty good pace. Now the reason for the cracked piston is still beyond me. When I took the cylinder off the ring were clocked in line. We figured the bypass compression blew oil in the air box and the top piston sucked it all in……oil everywhere inside and out at the track NOT GOOD. I felt it right away of course power was down. Compression test was at 60 after.
Cheapest option was to go with Pistal pistons as the price of one from Ducati is the same as 2 from Pistal. So I went that route. At that stage we took the valves out to make sure nothing touched and while at it since from factory the valves only have one angle on them we did a 4 angle valve cut on the heads witch gave a 5% increase in flow.
So now I got all the parts put back together and we find from factory the top piston cam timing was off 12 degrees ( wow ) and botton 7 degrees. So we had that adjusted and are now .5 degrees off from one another so a lot better.
Time to put I back in and of course after all that it runs horrible. Misfire all the way. I took a few days off from it because I could not figure out what was going on. Everything was in the right place. Played with it again going over the wires and it was only condensation in the coil plugs. Harness sat on the cements floor for about 2 weeks so maybe it’s that.
Now the bike idles very strong and is very responsive. Tried it out back slowly after doing 5 heat cycles and first impression that it going to pull like crazy. Response is better and torque is up for sure just going at 3k rpm it pulls my arms off.
Dyno tuning is set for July 15 so I will post the results once done.
Thanks
Etienne