1987 250x - Honda ATV Forum
Honda TRX Discussions for the Honda TRX, 90, 250, 300, 400, 450, 700

Reply
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Unread 07-04-2019, 06:40 AM Thread Starter
Member
 
tylerjones's Avatar
 
Join Date: May 2018
Posts: 65
Liked: 2 times
1987 250x

I bought my first semi-vintage bike, when I went to test ride the bike he had the idle turnt up pretty high. I test drove it bought it went home, opened my new toy before I got home (as every kid does lol) parked it. Last night I cleaned the carb and diaphragm out. I put the setting ton the carb back to where they was before I tore it does except for the throttle speed. I turnt it down so ots not high revving. I cranked her up, she would idle but not move, so I removed the side cover on the right side of the bike covering the throttle cable and pumped on the diaphragm because when I hit the gas it did not move well. So I got the bike to drive after that, she hesitates when I give it gas but it will slowly get up to speed if I dont hit the gas hard. After the test ride she cut off and wouldnt crank. She was really hot as well, hotter than normal. I pulled the spark plug and it was black. Cleaned it, installed it back and she cranked up. But yet she is running hot still. I know cleaning the plug wont cool it down. So I ordered a carb rebuild kit, that will be here sunday. Is there anything else that I should do to help cool this thing down or maybe is it my fault for inproper carb adjustment? I'm going to adjust the valves today as well and tinker with the carb until the new parts get here
tylerjones is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Unread 07-04-2019, 07:25 AM
Gold Supporting Member
Supporting Member
 
Goober's Avatar
 
Join Date: Jan 2014
Posts: 3,062
Liked: 1382 times
I think you’re doing all the right things there sofar except maybe the getting hot bit.
Check the service manual to see how the cooling system sposda work—it doesn’t have a cooling fan and likely not an overheat protection system but should have a hot light.

Test the oil temp sensor to see if it works

What carb number is it? QB01A? Does the choke work on the carb? If it sputters when warm then maybe not or pilot screw too far out.

Did you assemble the pilot screw in the right order? Tiny oring on top, tiny washer, tiny spring
Attached Thumbnails
Click image for larger version

Name:	8660276D-761E-4476-B7DD-907C9DD62F96.png
Views:	5
Size:	450.2 KB
ID:	137770  

_________________
Click link for Honda service manuals! 👀 see, right here👇🏻 Click it 👇🏻
https://drive.google.com/drive/mobil...13&direction=a

https://www.rockymountainatvmc.com/oem-parts

https://www.partzilla.com/catalog/honda
__________________

Last edited by Goober; 07-04-2019 at 07:32 AM.
Goober is offline  
post #3 of 16 (permalink) Unread 07-04-2019, 09:27 AM
Super Moderator
Supporting Member
 
SlammedRanger's Avatar
 
Join Date: Feb 2010
Location: Norwalk,OH
Posts: 4,277
Liked: 1251 times
Garage
The 250x dosnt have any sort of cooling help. It is an air cooled only. Dosnt even have an oil cooler. Just fins on the side of the motor. That being said at idle it will get very very hot. Not so hot it seizes but way hotter than most other engines. Black plug means your running rich. Which is what you want. Could also be a very very old worn out spark plug tho aswell. I would start by getting it to ride fast enough to get the air cooling fins working to your advantage before getting to worried about the hot motor. Unless its glowing red or seizing that is lol.

07 416ex
To many mods to list in signature(ran out of space lol)


Check out garage for full list
SlammedRanger is online now  
Sponsored Links
Advertisement
 
post #4 of 16 (permalink) Unread 07-04-2019, 11:43 AM Thread Starter
Member
 
tylerjones's Avatar
 
Join Date: May 2018
Posts: 65
Liked: 2 times
So I tore down the carburetor again to tinker around before the new parts came in, everything's there like it should be from reading the manual. I lowered the clip on notch on the throttle needle I noticed that the guide on the other side of the carburetor has threads and an adjustable nut on it. How do I go about knowing if that is at the proper height?
I rebuilt the carb slaped it on and it fired up first kick, it runs smooth until you get on it. It acts like the reve limiter is engaging! Is that to much fuel being dumped at once? Can I fix that problem? Or does that mean theres not enough fuel to catch up with the acceleration?
tylerjones is offline  
post #5 of 16 (permalink) Unread 07-04-2019, 12:07 PM Thread Starter
Member
 
tylerjones's Avatar
 
Join Date: May 2018
Posts: 65
Liked: 2 times
It sounds like the choke is engaged until it clears up
tylerjones is offline  
post #6 of 16 (permalink) Unread 07-04-2019, 12:39 PM Thread Starter
Member
 
tylerjones's Avatar
 
Join Date: May 2018
Posts: 65
Liked: 2 times
This is the piece I mentioned I'm not sure how this needs to be adjusted
Attached Thumbnails
Click image for larger version

Name:	20190704_143501_1562265445611.jpg
Views:	6
Size:	2.33 MB
ID:	137796  
tylerjones is offline  
post #7 of 16 (permalink) Unread 07-04-2019, 12:55 PM
Super Moderator
Supporting Member
 
SlammedRanger's Avatar
 
Join Date: Feb 2010
Location: Norwalk,OH
Posts: 4,277
Liked: 1251 times
Garage
The reason that is like that is so the fuel pulls from the bottom of the bowl. The reason they do that is for going up or down hills so it wont starve the main jet for fuel unless its completely upside down. Now that being said if that was adjusted down so far its touching the bottom it wouldnt get any fuel from the main jet. Which could be your problem. The best thing to do to set it right is to put the bowl back on and remove the bottom 17mm round cover. You will be able to see where the tip of the main jet sits and it should be about 1/4 inch down in. Not flush or sticking out at all. If its either of those its adjusted wrong.

07 416ex
To many mods to list in signature(ran out of space lol)


Check out garage for full list
SlammedRanger is online now  
post #8 of 16 (permalink) Unread 07-04-2019, 01:21 PM Thread Starter
Member
 
tylerjones's Avatar
 
Join Date: May 2018
Posts: 65
Liked: 2 times
That's how far it is I assume it needs to scoot down some?
Attached Thumbnails
Click image for larger version

Name:	15622680342316454438079073347763_1562268079495.jpg
Views:	6
Size:	502.3 KB
ID:	137798  
tylerjones is offline  
post #9 of 16 (permalink) Unread 07-04-2019, 01:28 PM
Super Moderator
Supporting Member
 
SlammedRanger's Avatar
 
Join Date: Feb 2010
Location: Norwalk,OH
Posts: 4,277
Liked: 1251 times
Garage
Yeah i would adjust it down alittle more.

07 416ex
To many mods to list in signature(ran out of space lol)


Check out garage for full list
SlammedRanger is online now  
post #10 of 16 (permalink) Unread 07-04-2019, 02:05 PM Thread Starter
Member
 
tylerjones's Avatar
 
Join Date: May 2018
Posts: 65
Liked: 2 times
Well I adjusted it as far as it would go which was not further than where it was at in the picture. It drives better, when I hit the gas it still has a delay but it pheesable until the rebuild kit comes in.
tylerjones is offline  
Reply

  Lower Navigation
Go Back   Honda ATV Forum > Honda Model Specific Discussions > Honda TRX

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda ATV Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome