Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
Members
Registered members
Current visitors
New profile posts
Search profile posts
Donations
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Other Honda Mini Trails
CT90, CT110, ST70, ST90 Discussion
ST50 Shifting issue + leak
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Thomas H." data-source="post: 181597" data-attributes="member: 9748"><p>Hi all,</p><p></p><p>Finally came around to come back on this. Thanks a lot for the kind words about the little machine. I appreciate that! Sadly the engine was the only part that I didn't dare touch myself, and that's the only thing that's been giving me quite some issues.</p><p></p><p>I followed all of your advises regarding the carburetor.</p><p>Checked for leaks, but there were none to be found. Adjusted the float level, but that didn't help. Checked how high the fuel level was, and actually realized that it wasn't too high. It was nowhere near the air screw, but still fuel was leaking, which puzzled me quite a bit. Adjusted the kick stand, and that didn't do a thing either.</p><p>I then gave up on it, and tried a brand new reproduction carburetor, and all of my issues were solved. No more leaks!</p><p>It was really quite weird issue, and can't come up with an explanation as to what might have been wrong with the carburetor.</p><p></p><p>I then started to take a look at the shift issue - thanks for the guidance all of you.</p><p>It actually appears that it isn't me who's using a wrong technique.</p><p>Normally neutral should be somwehere between 1st gear and 2nd gear, as far as I can understand, but not with this model apparently!</p><p>I found this information:</p><p><a href="https://advrider.com/f/threads/shifting-variations-on-old-school-bikes.1106909/" target="_blank">https://advrider.com/f/threads/shifting-variations-on-old-school-bikes.1106909/</a></p><p></p><p>It mentions the following shift pattern "1 up 2 down - positive neutral stop both up & down w/auto clutch - Honda C100, C102 & CM91".</p><p>It would appear that my bike is following the same pattern, and that one full stroke down changes from 1st gear to Neutral, and that a second full stroke will change it from Neutral to 2nd, meaning that going from 1st gear to 2nd requires a double kick.</p><p>Also found a discussion about it here as well:</p><p><a href="https://lilhonda.com/index.php?threads/dax-shift-pattern.10076/" target="_blank">https://lilhonda.com/index.php?threads/dax-shift-pattern.10076/</a></p><p></p><p>Meaning that the only question I have left is whether it's normal, that the rpm's need to drop to a very low level, before it's possible for me to change from 1st gear to Neutral. Nothing happens when I try to change gear if the engine is high in rpm's, but as soon as they drop to a low level, it engages perfectly.</p><p></p><p>Tried running the bike yesterday, and it's going really well. Only one issue; noticed that it's dying on me when making a standstill in 1st gear. Then the rpm's continues going lower and lower, until it dies completely after approximately one minute, unless I give it a bit of throttle. Managed to solve it by setting the rpm higher with the throttle screw, but not really the solution I wanted to use.</p><p>I then noticed that there appeared to be coming a little bit of oil from the head gasket, which might explain the behavior.</p><p>The engine head is torqued with 10 nm (7.38 ft lbs), so I'm considering to try and tighten it faster at around 12 nm (8.85 ft lbs) - hopefully that'll solve the issue? Don't hope that it's too tight.</p><p></p><p>Once again; thanks for all your help so far.</p></blockquote><p></p>
[QUOTE="Thomas H., post: 181597, member: 9748"] Hi all, Finally came around to come back on this. Thanks a lot for the kind words about the little machine. I appreciate that! Sadly the engine was the only part that I didn't dare touch myself, and that's the only thing that's been giving me quite some issues. I followed all of your advises regarding the carburetor. Checked for leaks, but there were none to be found. Adjusted the float level, but that didn't help. Checked how high the fuel level was, and actually realized that it wasn't too high. It was nowhere near the air screw, but still fuel was leaking, which puzzled me quite a bit. Adjusted the kick stand, and that didn't do a thing either. I then gave up on it, and tried a brand new reproduction carburetor, and all of my issues were solved. No more leaks! It was really quite weird issue, and can't come up with an explanation as to what might have been wrong with the carburetor. I then started to take a look at the shift issue - thanks for the guidance all of you. It actually appears that it isn't me who's using a wrong technique. Normally neutral should be somwehere between 1st gear and 2nd gear, as far as I can understand, but not with this model apparently! I found this information: [URL]https://advrider.com/f/threads/shifting-variations-on-old-school-bikes.1106909/[/URL] It mentions the following shift pattern "1 up 2 down - positive neutral stop both up & down w/auto clutch - Honda C100, C102 & CM91". It would appear that my bike is following the same pattern, and that one full stroke down changes from 1st gear to Neutral, and that a second full stroke will change it from Neutral to 2nd, meaning that going from 1st gear to 2nd requires a double kick. Also found a discussion about it here as well: [URL]https://lilhonda.com/index.php?threads/dax-shift-pattern.10076/[/URL] Meaning that the only question I have left is whether it's normal, that the rpm's need to drop to a very low level, before it's possible for me to change from 1st gear to Neutral. Nothing happens when I try to change gear if the engine is high in rpm's, but as soon as they drop to a low level, it engages perfectly. Tried running the bike yesterday, and it's going really well. Only one issue; noticed that it's dying on me when making a standstill in 1st gear. Then the rpm's continues going lower and lower, until it dies completely after approximately one minute, unless I give it a bit of throttle. Managed to solve it by setting the rpm higher with the throttle screw, but not really the solution I wanted to use. I then noticed that there appeared to be coming a little bit of oil from the head gasket, which might explain the behavior. The engine head is torqued with 10 nm (7.38 ft lbs), so I'm considering to try and tighten it faster at around 12 nm (8.85 ft lbs) - hopefully that'll solve the issue? Don't hope that it's too tight. Once again; thanks for all your help so far. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Other Honda Mini Trails
CT90, CT110, ST70, ST90 Discussion
ST50 Shifting issue + leak
Top