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Oil leak from right side cover ??

dannysvintagespeed
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Posts: 20
Joined: Mon Oct 15, 2007 8:56 am
Location: Zanesville,Oh

Oil leak from right side cover ??

Post by dannysvintagespeed » Sun May 25, 2008 7:49 pm

Hey guys- I've got a problem with a severe leak coming mainly from the little cutout directly under the countershaft sprocket.At first I thought it was coming from the breather hose coming from the top of the head.I'm getting a small amount of milky colored oil from it,but I lengthed the hose and ran it to under the bike to isolate the leak.The only way I could have oil coming out of that cutout or cover is a crank seal? Tell me I'm wrong.... please. Or is it just a bad gasket.I didn't think the stator runs in oil.At idle it doesn't seem to leak,only at speed after it gets hot.
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LOUD MOUSE
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Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Re: Oil leak from right side cover ??

Post by LOUD MOUSE » Sun May 25, 2008 8:10 pm

I recommend this to those who have oil on this side.
Get some spray can carb cleaner and corn starch.
Remove the kick starter cover and spray/clean with the cleaner.
Start the engine with the electric starter and allow the engine to warm and idle for a while.
Shut it off and allow it to cool then dust the side of the engine with the corn starch.
You will know which seal/area your leak is. .............lm

dannysvintagespeed wrote:Hey guys- I've got a problem with a severe leak coming mainly from the little cutout directly under the countershaft sprocket.At first I thought it was coming from the breather hose coming from the top of the head.I'm getting a small amount of milky colored oil from it,but I lengthed the hose and ran it to under the bike to isolate the leak.The only way I could have oil coming out of that cutout or cover is a crank seal? Tell me I'm wrong.... please. Or is it just a bad gasket.I didn't think the stator runs in oil.At idle it doesn't seem to leak,only at speed after it gets hot.
RIDE IT DON'T HIDE IT!

dannysvintagespeed
honda305.com Member
Posts: 20
Joined: Mon Oct 15, 2007 8:56 am
Location: Zanesville,Oh

Post by dannysvintagespeed » Sun May 25, 2008 9:29 pm

Thanks Ed, guess I'll just have to pull the cover and see whats going on.That kickstarter spring deal gives me nightmares though since I broke the spring when I wound it too tight and it snapped the first time I kicked it.Anyway it would have to be the crank seal or countershaft seal I presume. Don't have to split the cases I hope.That top hose is supposed to oil the chain,right? So it's normal to have some foamy lookin oil coming from that?

e3steve
h305 Moderator
Posts: 2601
Joined: Fri Oct 31, 2003 1:38 pm
Location: Mallorca, Spain & Warsash, UK

Post by e3steve » Mon May 26, 2008 2:39 am

Hi Danny,
Firstly, don't panic; there are no gaskets on the r/h side of the crankcase, and the oil seals are a piece of p155 to change out. Don't try digging them out with a screwdriver; buy yourself a pick set from a tool store (usually 4 different-shaped picks in a set), but only change the seal(s) that is/are leaking -- if it ain't broke......
Secondly, Ed's tip about tracing the source of the leak is great (every day's a school day!). Yes, you'll need to remove the silencer/muffler -- no drama (unless it's hot!) -- , the footpeg ass'y and release the fwd end of the chainguard but, with a socket set and a little patience, that takes all of 5 minutes; just sit yourself comfortably on a paint tin or something (unless you have a bike lift - oh, I wish...) and focus. Your kickstart shouldn't unwind (mine doesn't) but, just to be sure, take a 4.8mm x 300mm tie-wrap (zip-tie) and, before removing the r/h cover, wrap it 2 or 3 times around the kicker's pivot (don't remove the kick lever!) and pull it tight. If it still backspins then your return spring is too tightly wound (no wonder you broke one!).
Remove the stator (3 screws), the little sprocket plate and the starter chain (you may need to drop the starter motor off if your chain has no split link).
The biggest hurdle you need to clear is rotor removal; I've recently been through your situation and posted a simple puller idea http://www.honda305.com/forums/viewtopi ... c&start=20 (page 3), as have a lot of guys here. No doubt the best way forward is a proper puller; read what the guys have had to say.
The crank has 2 seals: the bigger of the two sits in the crankcase and seals the starter sprocket; the smaller is inside the sprocket itself and seals the crankshaft. Thanks to another on this forum -- namely davomoto -- I've discovered that most seals are freely available from most bearing suppliers and such. The number on a seal refers to the ID, OD and WIDTH -- e.g. the inner crank seal is 20-30-5 in millimetres (not inches! One day the USA will catch on to this metric idea....). I have these if you get stuck http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=015 -- but you should be able to get most from the aforementioned suppliers or Western Hills Honda. Mine are relatively expensive because a) everything here in Mallorca is imported and b) 'postage' means that that which has been imported must now be exported from the island, metaphorically-speaking.
Remember: it's all part of the fun!

G'luck and regards,

Steve

LOUD MOUSE
honda305.com Member
Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Mon May 26, 2008 4:14 am

The vent hose is to allow pressure which builds up inside as the engine runs to escape. Normally not much comes out unless the rings are getting bad. ..............lm
dannysvintagespeed wrote:Thanks Ed, guess I'll just have to pull the cover and see whats going on.That kickstarter spring deal gives me nightmares though since I broke the spring when I wound it too tight and it snapped the first time I kicked it.Anyway it would have to be the crank seal or countershaft seal I presume. Don't have to split the cases I hope.That top hose is supposed to oil the chain,right? So it's normal to have some foamy lookin oil coming from that?
RIDE IT DON'T HIDE IT!

dannysvintagespeed
honda305.com Member
Posts: 20
Joined: Mon Oct 15, 2007 8:56 am
Location: Zanesville,Oh

Post by dannysvintagespeed » Mon May 26, 2008 1:05 pm

I feel better now.Glad to hear they will r/r from one side.Excellent advice from both of you guys-
appreciate it !!!!!! I'll let ya know what I find..... Danny

dannysvintagespeed
honda305.com Member
Posts: 20
Joined: Mon Oct 15, 2007 8:56 am
Location: Zanesville,Oh

Post by dannysvintagespeed » Tue May 27, 2008 8:08 pm

Well,followed Emo's advice,pulled the cover,cleaned everything off and started it.Ran it for a few minutes till she got hot and no oil leak.What the ??? Then I took a phillips screwdriver and pushed the clutch rod while it was running and found my leak.Explains why it never leaked until I rode it. Does anyone sell that clutch rod seal without buying a complete gasket set? Also want to change to a 14t front sprocket while I've got the cover off if I can find one.Running 30/15 now.

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