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  1. #1

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    Ultra 150 crank seals

    ULTRA 150 ??
    Rebuilding a 2001... the second crank/oil seal in from the pto side calls for part # 92049-3730 But looks to big to fit...
    I have three case's ..99 and two 2001's All have same ## on case 1804 118 ...The only thing I can think is Kawasaki used the 99 case's into the 2000-2001 years so I need the 99 seal #92049-3729...
    HAS ANYONE RUN INTO THIS PROBLEM


  2. #2

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    Ok pulled open the (OTHER) 2001 case this one has deeper groove for the oil seals..so I must have two 99 case's

  3. #3
    Only difference between cases is the starters were bigger from 01-05. They machined the case just slightly to fit the bigger starter. There is no difference in seals, they are all the same from 99-05. Are you sure you have thr correct seal in the correct place? They can be alittle tricky and parts diagram kinda sucks.

  4. #4
    I would like to bump an old thread as have a similar query. There is a different part number for the 1999 model crank oil seal
    92049-3729 vs 92049-3730 for a later model.

    The other oil seals for the crank all seems to be the same part number. What is the main difference in this seal?

  5. #5
    The rear has two seals while the front has one. The seals are different, it's been some time since I had my 1200 apart but if you place the incorrect seal in the incorrect spot it will blow out. I picked up a parts ultra with this exact problem, front crank seal was wrong pulled all two stroke into cylinder and the gears blew apart.

  6. #6
    Sorry, what I mean is that the seal nearest the coupler has different part numbers depending on it being 1999 or 2000+. The other side I get is a different seal but it has the same part number irrespective of year.

    Perhaps a silly question but how might I determine if I have a 1999 crankshaft?

  7. #7
    steve45's Avatar
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    Quote Originally Posted by daz_ni View Post
    Sorry, what I mean is that the seal nearest the coupler has different part numbers depending on it being 1999 or 2000+. The other side I get is a different seal but it has the same part number irrespective of year.

    Perhaps a silly question but how might I determine if I have a 1999 crankshaft?
    Looks like the crankshaft numbers are the same, I think it's the crankcase that is different.

  8. #8
    Correct crank cases are different. 00-01 02-05... only difference I have noticed is where the starter bolts up, 02-05 is machined so it can fit a bigger starter. I have put a few of these together and always used the newer seal. I really dont think there is a difference in that part of the case.

  9. #9
    I was just worried that if I put a 1999 seal on a 2001 crank then I'll have problems.

  10. #10
    Just like steve said, part numbers are the same from 99-05 for crank shaft. Shouldn't have any issues

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