you are correct. I'm putting a 999S motor in my 998 whenever I sell the 998 motor and exhaust, and can afford to buy an exhaust (996R,998R,998S) that will route around the lower oil sump. However the 748R and with shower injectors and the 998 are the only ones that will accept a testastretta motor because the frames from the 748,916,996 won't clear the shower injectors. You'd have to custom make the throttle body/injector thingy. Yes, that's the technical term.
748R has shower injectors to begin with, but I'm not sure how similar the frame is to a 998. I know the 748R frame is lighter and made for the larger airbox
748R has shower injectors to begin with, but I'm not sure how similar the frame is to a 998. I know the 748R frame is lighter and made for the larger airbox
As far as I know 748R and 996R should have the same frame so a 998 engine should fit for sure. Hope the 999 will fit too. One problem is the injection as the 748R runs with ECU 16 and 996R, 998 and 999 has ECU 59. Anyone knows is it excists an ECU 16 EPROM for a 998? It would be good as a starting point for the tuning? That would make life much easier the starting from zero.
Jocke..........
__________________
MHR 900 1984
851 Strada 1991 (now growing to 996)
S4 984 2002
A 999 swing arm will bolt right up to the 748 frame, as will the shock and linkages. you will need a 10-15 mm longer ride hieght adjuster to get the right ride hieght.
I have a complete 999 rear suspensionand wheel if you want to convert it
I have a 998 in a 2001 996 frame and it fit in there with a little modification to the coil brackets to move the coils outboard some. I am using a 996 airbox. The bar that connects the two injector bodies on the 998 had to be trimmed a little to clear the frame cross member. The real challenge is to adapt the 996 oil cooler to the 998 head as there is significant difference in the 996 and 998 oil cooler brackets. Another issue is that the waterproof terminal on the wiring harness of the 998 doesn't connect to the 996 fan's terminal because they are of a different design. The 998 has two fans with unique connectors.
I also installed the 998 battery box as the ignition is not mounted under the seat as on the 996, but rather on the back side of the battery box. I installed my Power Commander under the seat on a custom bracket.
Would you have pics of your mods? That woul be pretty interesting for worldwide ducati owners who'd like to swap their D4 for a TS!
Congratulations for the swap
Do all 748R's have the showers, and able to accept 999 engines, or just the '02's?
Thx
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'01 996s (Rosso), #283 aka Beast - Big Apple Eater, VERY sadly gone off to a good home!
'02 748R (Rosso), #873 aka Beast II - Down-under Thunder, goodonyermate
A 999 swing arm will bolt right up to the 748 frame, as will the shock and linkages. you will need a 10-15 mm longer ride hieght adjuster to get the right ride hieght.
I have a complete 999 rear suspensionand wheel if you want to convert it
Sorry this is NOT correct. Both the shock and the link would have to be longer. The rocker has to stay at the same angle as designed relative to the swingarm. Changing that angle alters the suspension rate dramatically.
Sorry this is NOT correct. Both the shock and the link would have to be longer. The rocker has to stay at the same angle as designed relative to the swingarm. Changing that angle alters the suspension rate dramatically.
You are right. my bad, we bolted that stuff up to a spare frame we had and the decied it was just to damn ugly anyway...
But just to test your theroy I am going to do a pull down test on the rocker are angle. I really do not think the angle of a fixed 3 point system will matter that much.
ok so here is what i found out about the 748-999 motor and frame jobs. the desmoquatro frames would either require moving/modifying the cross member becuase the link bars that hold the two separate throttle bodies together interfer. however this is except for the 996R(which is a 998) and the later 748R models that came with shower injectors. the frame is the same however slightly lighter but actual geometry is the same as i have had both side by side 998/748r/748. the motor itself will fit 998/999 powerplant into a desmo frame. as far as wiring goes if you opt to stay with the older wiring harness 1.6m then stay with the old radiator and one fan. unless you want to start cutting and adding your own connectors on the harness and fans. the 998/999 use two less sensors. the 998 does not have the sensor on the top of the water coolant expansion tank and a tempeture sensor is removed and plugs with an aluminum blue plug. you will also need to get the 998 radiator hoses which are sllightly different. the 999 uses a metal tube which is part of the case so that would have to be changes or get custom hoses made. the sprockets are different as the 996 has two bolts and a plate and the 998 has one large bolt that threads onto the shaft. ok back to the wiring if you are switching to the 998 harness then you will have to change the starter solinoid as well because it is a different connector, the spark plug wires are different and the front part of the harness is about 2" longer. the sensor under the head light assembly is different as well as the mount. the battery tray is different to support the ecm which is mounted near the battery. and moves the starter solinoid slightly. additionally the turn signal flasher unit is different. as well as the way it mounts.
the air boxs are different. the 748-996 use the same, the 748R's with shower injectors came with a much larger box, the 998 is somewhere in the middle. the injector systems are different. the 748 has two direct injectors (one per cyl). the 748R has aluminum shower injectors that are suspended by two metal rods, two injectors shower type (one per cyl) non machined version of the RS, the 996 used four injectors direct injection (two per cyl), the 996R and the 998, 998s, 998R all used the same throttle bodies and injectors which are shower type but suspende from the venturies. this is why the aftermarket air filters are different. the 999 shower injectors are very similar except the fuel hose is slightly different in the way is is routed and there is only one cross member instead of two. so you might have to change that segment of wiring depending on the changes.
so if you are going to put a 999 motor into the 998 swap the left part of the engine over. and you are pretty good. might just stay with the 998 showers being they were designed for that airbox.
also the 2003 999 bip and mono and s were the same motor as the 998.
the 2004 999 bip and mono were the same as the 02 998
the 2004 999 s had upgraded cams (2001 996R/2002 998R) and deep sump (only certain models not all in us)
the 2005 bip and mono had the deep sump and the "R" cams. now i am not sure about the 06 but i heard there were no changes except the R. all of the R's had light components and even different bore and strokes so those are different machines.
I hope this helps you out. if you have any questions feel free to email me direct at nauidiveinstructor@hotmail.com . i am currently overseas and am unable to find the time to check this frequently. thanks to everyone who helped me when i was going through the pains of my motor swap.
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Never Quit
'02 998 Yellow mono
'02 748 Yellow-converted
'97 748 Yellow-dead
'95 916 Red
'97 GSX-R Red-gone
Sorry this is NOT correct. Both the shock and the link would have to be longer. The rocker has to stay at the same angle as designed relative to the swingarm. Changing that angle alters the suspension rate dramatically.
Sorry alex, but we did some tests with a hydraulic jack,tape measure and scale. we put the scale under the wheel and ratched the bike down at 1/4 inch increments. we made the ride hight rod as short as possiable and as long as posiable changing the angle of the rocker nearly 20 degrees......no change. so the rocker arm angle is not that important. That would allow you to use the stock shock with a longer ride hieght rod
Sorry alex, but we did some tests with a hydraulic jack,tape measure and scale. we put the scale under the wheel and ratched the bike down at 1/4 inch increments. we made the ride hight rod as short as possiable and as long as posiable changing the angle of the rocker nearly 20 degrees......no change. so the rocker arm angle is not that important. That would allow you to use the stock shock with a longer ride hieght rod
Aaron
Sorry but that test doesn't duplicate the the lowering of the shock 2 inches and then using that as your start point. It is the rate of spring rate change that is altered. The factory race bikes have a rocker with two holes only 3/4 of inch apart and it isn't a lightening hole.
Sorry but that test doesn't duplicate the the lowering of the shock 2 inches and then using that as your start point. It is the rate of spring rate change that is altered. The factory race bikes have a rocker with two holes only 3/4 of inch apart and it isn't a lightening hole.
Do you any data to back that up? We had the scale under the rear wheel pulling down on the rear subframe. If I were to change the spring and repeat the test in 1/4 inch increments the numbers would be differant. The rocker arm angle does not matter, No matter what angle it is, the same input will be the same output, it is a fixed 3 point system.. Yes the shock is lower, but so is the ride hieght rod, the only thing that changes is the angle of the rocker, whiche does not matter as much as you think it does.
Engine swap 748R,998,999?
ok so here is what i found out about the 748-999 motor and frame jobs. the desmoquatro frames would either require moving/modifying the cross member becuase the link bars that hold the two separate throttle bodies together interfer. however this is except for the 996R(which is a 998) and the later 748R models that came with shower injectors. the frame is the same however slightly lighter but actual geometry is the same as i have had both side by side 998/748r/748. the motor itself will fit 998/999 powerplant into a desmo frame. as far as wiring goes if you opt to stay with the older wiring harness 1.6m then stay with the old radiator and one fan. unless you want to start cutting and adding your own connectors on the harness and fans. the 998/999 use two less sensors. the 998 does not have the sensor on the top of the water coolant expansion tank and a tempeture sensor is removed and plugs with an aluminum blue plug. you will also need to get the 998 radiator hoses which are sllightly different. the 999 uses a metal tube which is part of the case so that would have to be changes or get custom hoses made. the sprockets are different as the 996 has two bolts and a plate and the 998 has one large bolt that threads onto the shaft. ok back to the wiring if you are switching to the 998 harness then you will have to change the starter solinoid as well because it is a different connector, the spark plug wires are different and the front part of the harness is about 2" longer. the sensor under the head light assembly is different as well as the mount. the battery tray is different to support the ecm which is mounted near the battery. and moves the starter solinoid slightly. additionally the turn signal flasher unit is different. as well as the way it mounts. 
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