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H2 Oil leak
Posted: Mon Nov 10, 2025 4:45 pm
by Fineline
Hi My H2 seems to leak 2 stroke oil from around the oil pump area. Is there a common place to check first ? I've never really looked at this system before and not sure where to start. Thanks in advance. By the way the previous owner had the oil leak fixed by Jawasaki earlier this year.
IMG_20251110_161115_1CS.jpg
Re: H2 Oil leak
Posted: Mon Nov 10, 2025 6:05 pm
by Wolfie
It is very common but I'm afraid it is up to you to pin down where it is coming from...
Banjo Gaskets? (any one, or more).
Feed Pipe to Banjo?
Pump End Cap?
Cam Oil Seal?
Drive Pinion Oil Seal?
Those are the usual places.. not in any order of popularity.
Dabbing around with the tip of a Kitchen roll sheet should help pin it down. Good Luck.
Re: H2 Oil leak
Posted: Mon Nov 10, 2025 6:20 pm
by skub
The part with the hole in it is the kitchen roll shelf.
Re: H2 Oil leak
Posted: Mon Nov 10, 2025 7:52 pm
by SAM
Do not be tempted to over tighten bolts!
Re: H2 Oil leak
Posted: Tue Nov 11, 2025 7:18 am
by Fineline
Ok thanks, I'll go for the kitchen roll instead of the breaker bar.
Re: H2 Oil leak
Posted: Tue Nov 11, 2025 5:11 pm
by Nigel S
Looking at the second picture it looks like it's the camshaft seal leaking. I think that's red oil in the return spring.
Re: H2 Oil leak
Posted: Wed Nov 12, 2025 10:36 am
by Wolfie
Camshaft??
You had me going for a minute there Nigel 
... But well spotted 
Re: H2 Oil leak
Posted: Sun Nov 16, 2025 8:59 am
by scouse
Fineline wrote: ↑Mon Nov 10, 2025 4:45 pm
Hi My H2 seems to leak 2 stroke oil from around the oil pump area. Is there a common place to check first ? I've never really looked at this system before and not sure where to start. Thanks in advance. By the way the previous owner had the oil leak fixed by Jawasaki earlier this year.
IMG_20251110_161115_1CS.jpg
My 1st port of call would be the loose banjo bolt in your second picture
Re: H2 Oil leak
Posted: Sun Nov 16, 2025 9:00 am
by scouse
Screenshot_20251116-085932.png
Re: H2 Oil leak
Posted: Tue Nov 18, 2025 5:26 pm
by Fineline
Thanks. I snugged them all down cautiously. It was unfortunately still leaking, so I replaced the 2 oil feed washers as they looked a tad iffy, to me. I didn't have any new ones so I tried a couple of spare plastic washers for my Suzuki GT550's oil feed system. It hasn't leaked since.
Re: H2 Oil leak
Posted: Tue Nov 18, 2025 8:55 pm
by scouse
Glad you got it sorted
Re: H2 Oil leak
Posted: Wed Nov 19, 2025 9:09 am
by Wolfie
Fineline wrote: ↑Tue Nov 18, 2025 5:26 pm
It hasn't leaked since.
Re: H2 Oil leak
Posted: Wed Nov 19, 2025 10:44 am
by skub
Always good to get a result.
