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Offline concave3

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expansion chamber
« on: August 26, 2011, 11:36:29 AM »
ive got an FMF pipe on my 250 with about a palm sized dent in the lower half of the expansion chamber... im having it repaired right now, what kind of power do yall think I should gain if any from fixing it, just wondering if anyone has had experience with this, or heard something about it... thanks!
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rallyripper

Offline concave3

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Re: expansion chamber
« Reply #1 on: August 29, 2011, 09:18:17 AM »
well got the pipe back looks great, I would post pics but I dont have sim to usb right now... but im gonna test it out later today, and see if its opened up the powerband, atleast it doesn't have a huge ugly dent anymore 8-)
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rallyripper

Offline 1989kawasaki

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Re: expansion chamber
« Reply #2 on: August 29, 2011, 09:19:45 AM »
Sweet! let us know if it makes a difference
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1977 RD400
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1988 CR500
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Offline concave3

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Re: expansion chamber
« Reply #3 on: August 29, 2011, 03:28:27 PM »
well I like it :-D the powerband comes on smoother and quicker, and it carries way up hire in the revs, it really opened it up! I can hold the wheelies real good!

but after I rode it around I shut it off, then I hopped back on it fired up first kick and now my powervalves wont open :cry:
the rod is still connected to the lever that comes out of the cylinder but I think the mechanical governor in the case is messed up somehow, once I fix one thing another goes wrong!
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rallyripper

Offline 1989kawasaki

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Re: expansion chamber
« Reply #4 on: August 29, 2011, 03:37:46 PM »
thats nice the power was improved, but that whacks about the powervalves.

if the govenor is really broken ill give you a good deal on my extra govenor i have in my spares box.
did you check the nut on the actuator arm?
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bikes

1977 RD400
1989 CR250
1988 CR500
1978 Z50
2009 Harley super glide custom

Offline concave3

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Re: expansion chamber
« Reply #5 on: August 29, 2011, 04:34:11 PM »
well I can move the rod with my finger and I hear the valves opening in the cylinder... I dont know much about what would be wrong if the nut somehow tightened itself :? but im guessing that theirs something wrong with the governor but I still need to learn more about that part of the system... its kinda weird it reminds me of an old air cooled 2 stroke with no powervalves and a flat top end lol the engine feels smooth though when its not screaming to all hell atleast...
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rallyripper

Offline 1989kawasaki

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Re: expansion chamber
« Reply #6 on: August 29, 2011, 04:41:00 PM »
take off the whole clutch cover and have a look at it  and report back with what you find .
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bikes

1977 RD400
1989 CR250
1988 CR500
1978 Z50
2009 Harley super glide custom

Offline concave3

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Re: expansion chamber
« Reply #7 on: August 29, 2011, 04:44:28 PM »
yup, will do be back in a few days
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rallyripper

Offline concave3

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Re: expansion chamber
« Reply #8 on: August 30, 2011, 04:14:55 PM »
well it turns out that the ball on the slider coming out of the cylinder came off, it has 2 tiny circlips and the outer one came off and the ball dropped somewhere, its only guna be about 10 bucks from bike bandit which is good...

pipe before



during


after



and of course the powervalve problem  :x



and next to my broś 86 rm 250

« Last Edit: August 30, 2011, 04:30:06 PM by concave3 »
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rallyripper

Offline 1989kawasaki

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Re: expansion chamber
« Reply #9 on: August 31, 2011, 09:55:01 AM »
thats strange that would happen.. did you have the black rubber boot under the grey cap for the arm?
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bikes

1977 RD400
1989 CR250
1988 CR500
1978 Z50
2009 Harley super glide custom

Offline concave3

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Re: expansion chamber
« Reply #10 on: August 31, 2011, 12:05:22 PM »
no I didn't it never came with the bike when I bought it... good news is I went to the spot I was riding and miraculously found the roller  :-o I think im just get slobber some JB weld on it so the bastard doesn't fall off again!
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rallyripper

Offline kwakman

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Re: expansion chamber
« Reply #11 on: September 12, 2011, 11:18:21 PM »
which is quicker, kwak or suzi??K.
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And lo, I did loft the front wheel and carried it forth to the unbelievers, and cast it down before them and said unto them ''look now upon the might of my throttle control ye pitiful cretinous ones''
And the unbelievers did quake in their boots....

Offline concave3

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Re: expansion chamber
« Reply #12 on: September 13, 2011, 07:11:35 AM »
well he just got the rm and it had a bad water pump seal(s) and it was burning gear oil... so he fixed the water pump seals and it still was burning oil, so I told him its probably his right hand main seal so were gonna check that soon... but as far as it stands my KX is way faster! hes just in my dust all day lol
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rallyripper
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