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Cleaning spark plug cavity? (Read 165 times)
Rylee
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Cleaning spark plug cavity?
04/14/15 at 15:42:42
Sorry for the thread topic couldn't think of it's exact term. Since there's no cap on it anymore it's really dirty inside the cavity where the spark plug is. How do I go about cleaning that area out without damaging anything or getting sediment inside where it doesn't belong. I noticed today some water must of got in there and the gunk has leaked out of the fins in the front portion below the decomp lever. It's a mess in there and I'd like to get it right.
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Rylee
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Re: Cleaning spark plug cavity?
Reply #1 -
04/14/15 at 15:46:37
Note*
I topped off the oil the other day after searching about miss shifts between 4th and 5th. I may very well have "over filled" it and I wonder if it's possible that it's leaking up there because of too much oil. It's always been dirty in there but after riding to work today it's the 1st time I've noticed it being wet.
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Art Webb
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Re: Cleaning spark plug cavity?
Reply #2 -
04/14/15 at 16:34:42
I blew mine out with a compressor, but it wasn't wet
if you think it's oil, blast it out with Brake Parts Cleaner, it'll flush the oil, if that's what is is, and evaporate quickly leaving no residue
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Re: Cleaning spark plug cavity?
Reply #3 -
04/14/15 at 16:36:40
BTW, did you just not bother putting the nut back on where the upside down bolt goes through? I always hears you were supposed to stick some washers on that and re-tighten the nut, within reason
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Rylee
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Re: Cleaning spark plug cavity?
Reply #4 -
04/14/15 at 19:20:54
@Art Webb
I wondered the same thing about that reversed bolt. That's how it was when I bought the bike. I watched the RYCA videos on both cafe and bobber builds and they just cut the bolt and did nothing more.
I'm gonna try some parts cleaner and see if that works. Just wanted to know if a little water in there to wash it out can cause damage. Like is there anywhere it can go other than the spark plug hole that would do harm.
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Art Webb
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Re: Cleaning spark plug cavity?
Reply #5 -
04/14/15 at 20:26:11
I doubt water would hurt anything, but IMO I think the brake cleaner is far superior at getting gunk out
If RYCA cuts the bolt off it must not seal anything, maybe I'lll back off the nut some, to be honest i think I may have tightened it more than I should have
do you by chance remember which of the vids deals with the bolt?
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Re: Cleaning spark plug cavity?
Reply #6 -
04/14/15 at 21:04:01
The CS 1 video part 2 and the RR Bobber video part 2 as well. It's about half way IIRC when they talk about the decomp mod.
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Re: Cleaning spark plug cavity?
Reply #7 -
04/14/15 at 21:27:09
Thanks, gonna watch those
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Re: Cleaning spark plug cavity?
Reply #8 -
04/14/15 at 22:25:08
Art Webb wrote
on 04/14/15 at 21:27:09:
Thanks, gonna watch those
Art if you pull up the CS 1 tear down video and fast forward to about 8 minutes it shows the cover removal and he talks about cutting the bolt. I had to go back and check. I watched all of these originally when I was trying to figure out how to install the thumb decomp lever since the bike didn't have it on when I got it.
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Re: Cleaning spark plug cavity?
Reply #9 -
04/15/15 at 03:53:37
The long bolt does hold down a corner of the head cap, and some of us believe that is should be tightened down...even when the chrome head cap cover is removed.
This is not the most elegant solution - but it worked for me. This is a piece of aluminum tubing with a nut....some folks have just used stacked up washers.
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Re: Cleaning spark plug cavity?
Reply #10 -
04/15/15 at 08:21:20
@dave
Doesn't this bolt right above and behind the decomp lever do the same?
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Re: Cleaning spark plug cavity?
Reply #11 -
04/15/15 at 09:18:35
See the lower left hole in this photo? That is the sealing surface you are not pulling down tight if you leave that left front bolt without a nut on top.
Wonder where your oil leak is coming from?
(I think it should be tightened....you can leave the nut off if you want on your bike....I put a spacer and nut on it).
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Re: Cleaning spark plug cavity?
Reply #12 -
04/15/15 at 10:47:51
@Dave
Now that I see the surface it makes sense. Wonder why RYCA would say in a video it not important if it's actually a corner section of the mating surface that's there for a reason. Now I've just gotta figure out how to get a bolt back in there without removing the entire top. Does that cone off without pulling the engine?
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Re: Cleaning spark plug cavity?
Reply #13 -
04/15/15 at 10:58:43
I used stacked washers, guess I'll leave em on
still probably need to back off a bit, it was hard ton judge how tight it was with the washers shifting, but I probably put it on too tight
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Re: Cleaning spark plug cavity?
Reply #14 -
04/15/15 at 12:19:56
Getting a shorter bolt in there is easy-peasy.
Get a piece of threaded rod....metric or US in the size that fits.
Drop it down in the place it needs to go...and mark it length so you can get a washer and nut on top....an acorn nut looks best.
Then cut the threaded rod to length.
Put threadlocker on the end of the threaded rod, and then using an open end wrench or needle nose pliers push the nut between the fins at the front of the engine, and then get the nut threaded on. Leave it alone overnight and let the threadlocker set.
Then put the washer and nut on the top of the stud....and snug it down.
Done!
(As an alternate you can try and find a bolt just the right length, and then try and hold a nut in place in the bottom while you thread the bolt down from the top - but it takes a bit more skill and luck).
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