Honda Spree and Elite 50 Forums

I think i might have had a soft seize today. i was riding around for about 30 min or so and then my bike cut off. i tried to start her but she wouldn't turn over. when i kicked started her she turned over then i was able to start her.
before this happened my compression was 142 now it is 115.
what do you guys think?


thanks:
TJ

Greetings:

If your compression dropped 30PSI, it's more than a soft seize. Time to dismantle and inspect, then find the reason.

Wheelman-111 wrote:Greetings:

If your compression dropped 30PSI, it's more than a soft seize. Time to dismantle and inspect, then find the reason.

i took everything apart after the compression test. rings, piston, and jug all look good. any suggestions on why the compression might have dropped so much?

Greetings:

I suggest you reicheck the compression holding the throttle wide open.
If it's the same, and you're sure of the 142 before, suspect a crank seal, bad reed, or gaskets as Mike said.
I bet the crank seal because it was sudden. The vac leak and lean-out could've caused the overheat and seize, too.

Wheelman-111 wrote:Greetings:

I suggest you reicheck the compression holding the throttle wide open.
If it's the same, and you're sure of the 142 before, suspect a crank seal, bad reed, or gaskets as Mike said.
I bet the crank seal because it was sudden. The vac leak and lean-out could've caused the overheat and seize, too.

positive on the 142 b/c i checked it three times b/c i thought it was a little high. i've never done a compression check w/ the throttle wide open. what does this do?


Thanks:
TJ

iceman77 wrote:

Wheelman-111 wrote:Greetings:

I suggest you reicheck the compression holding the throttle wide open.
If it's the same, and you're sure of the 142 before, suspect a crank seal, bad reed, or gaskets as Mike said.
I bet the crank seal because it was sudden. The vac leak and lean-out could've caused the overheat and seize, too.

positive on the 142 b/c i checked it three times b/c i thought it was a little high. i've never done a compression check w/ the throttle wide open. what does this do?


Thanks:
TJ

Always do a compression check with throttle at WOT. Gives you a more accurate and consistent reading.

Greetings:

If less air gets in, there's less to compress.
Removing the carb altogether is even better.

Bad reed or seals let air out =
less air.

iceman77 wrote:Always do a compression check with throttle at WOT. Gives you a more accurate and consistent reading.

got ya. thanks for the info. will it be a lower reading when doing it at wot?



TJ

iceman77 wrote:

iceman77 wrote:Always do a compression check with throttle at WOT. Gives you a more accurate and consistent reading.

got ya. thanks for the info. will it be a lower reading when doing it at wot?



TJ

Almost always higher.

iceman77 wrote:Almost always higher.

dang. so my 142 from before would've been to high if i would have done the check at wot.

TJ

iceman77 wrote:

iceman77 wrote:Almost always higher.

dang. so my 142 from before would've been to high if i would have done the check at wot.

TJ

Yes.

well crap... mybe i should just put the stock bore back on.


TJ