Primary side oil seal

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monkeyrocco
Newbie
Posts: 8
Joined: Fri Apr 02, 2021 7:09 pm

Primary side oil seal

Post by monkeyrocco »

Hi, all i rebuilt the top end of my kr1last year and it has ran superbly no knocks or rattles and has loads of power always starts first kick. The only problem is it uses gearbox oil no leaks it burns it 100 miles or so and its used the lot. Now i know the sensable thing is to have the whole crank done but has anyone managed to pick out the seal and replace it ? And if so were can i get one cheers in advance Phill
jarno
Oil Injector
Posts: 706
Joined: Sat Aug 08, 2009 9:29 pm
Location: the netherlands

Re: Primary side oil seal

Post by jarno »

If the engine uses that much oil you must rebuild yout crank complerely.
Do not try to replace only one seal , the problem wil still be there.
Kr1s C1 zeus blue
Kr1s c2 black green
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ZXR250A
Paul250B
Heavy Smoker
Posts: 103
Joined: Thu May 14, 2020 11:17 pm

Re: Primary side oil seal

Post by Paul250B »

How could you possibly know it’s the primary gear side oil seal?
Both inboard seals are subjected to gear oil too, out of the 4 crank oil seals only the seal behind the stator isn’t bathed in oil, so the leaking seal could be anyone of those 3 but likely all 3 to some extent, and then there’s the chance of an air leak at the stator…. Best to have the crank rebuilt.
monkeyrocco
Newbie
Posts: 8
Joined: Fri Apr 02, 2021 7:09 pm

Re: Primary side oil seal

Post by monkeyrocco »

Cheers thats my question answered crankrebuild it is thanks for the replies
Paul250B
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Re: Primary side oil seal

Post by Paul250B »

monkeyrocco wrote: Mon May 16, 2022 6:24 pm Cheers thats my question answered crankrebuild it is thanks for the replies
Assuming located in the UK? Grampian have a fantastic reputation and turn around speed for these cranks
monkeyrocco
Newbie
Posts: 8
Joined: Fri Apr 02, 2021 7:09 pm

Re: Primary side oil seal

Post by monkeyrocco »

Thanks Paul i will get in touch with them
monkeyrocco
Newbie
Posts: 8
Joined: Fri Apr 02, 2021 7:09 pm

Re: Primary side oil seal

Post by monkeyrocco »

Just googled Grampian and convenientley they are in liverpool and so am i sorted thanks again
Paul250B
Heavy Smoker
Posts: 103
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Re: Primary side oil seal

Post by Paul250B »

monkeyrocco wrote: Fri May 20, 2022 7:56 am Just googled Grampian and convenientley they are in liverpool and so am i sorted thanks again
Perfect!
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