94 TRX300FW Power Issue - Honda Foreman Forums : Rubicon, Rincon, Rancher and Recon Forum
Reply
 
LinkBack Thread Tools
post #1 of 17 (permalink) Old 04-25-2019, 10:03 PM Thread Starter
Honda Rider
 
PowerStroke70's Avatar
 
Join Date: Apr 2019
Posts: 19
94 TRX300FW Power Issue

I could use a little advice from some of you that ha e even wrenching on the ol machines longer than me and familiar with the 300's. I've gotta 94 300fw and put a top end with a fresh bore, new piston kit, rings, head job with new seats and seals, new valves, springs, new rockers in the rocker box, sprocket, cam, DID chain, and gasket and seal set all Honda parts and G & H did the machine work and head. I also put a new Shindy kit in my carb after stripping the carb down and running it through my sonic cleaner. Installed new fuel line and in line filter as well.
Got her all back together and she won't hardly get out of her own way! I've checked timing probably 3 times at least and adjusted the valves, which was correct after the 1st time but had to start somewhere lol. I ruled timing out since it fires up as soon as you hit the button, I mean better than it ever has and then started thinking maybe the centrifugal clutch or something in the right side case may be a tad outta whack but she takes off through all the gears, shifts great, no weird clanking or other noises so ruled that out also.
So the only thing I can conclude it's the carburetor but still not positive. I talked to @jeepwm69 today and he seemed to be on board with what I was thinking after knowing all the details, as well as suggesting I post my issue here and see if @toodeep has any ideas or suggestions other than adjusting the pilot jet on the carburetor. I've played with it a little and it's gotten a little better but still just really weak and will barely go in the ditch and pull up the other side, which isn't very steep and should have done it with ease and would before this 2nd little go around of repairs.
It got to a point to where it went up better but still real sluggish and not pulling like it should, even just taking off through a flat field going through the gears.
Like I said, it's getting better but I still feel like I've missed something, something small and very stupid 🤣🤣🤣! I'm ready to listen to any and all suggestions anyone has so bring it on boys, let the games begin!!!! Oh, and by the way....I've been fooling with this flippin thing for several weeks and several of us are going Saturday to Kentucky to ride so I'm seriously running outta time! 🤯😁😳🤢🤣&#x1f 923;🤣🤣🤣🤣!!!! I have mixed emotions as to if it'll adjust and be ok or not but it almost has to because it starts so friggin well and idles perfectly and sounds amazing with no tricks, valve noise or anything so that's why I listened to Jeep and posted here and bounce it off ya'll. I greatly appreciate any suggestions or experiences had like this or questions for me, just whatever at this point, so what do ya'll think?
PowerStroke70 is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 04-25-2019, 11:51 PM
Administrator
 
toodeep's Avatar
 
Join Date: Aug 2007
Location: south dakota
Posts: 12,927
Garage
I'm going to guess it just wont rev up to get the power needed. How did the rubber look on the throttle slide? DOD you blow all the ports out and make sure they was clean after the ultrasonic bath? Exhaust flowing good? Intake tube free from obstructions ( rag, old bee nest, etc)?

Sent from my SM-G965U using Tapatalk



2007 420FM (475cc, 27x12x12 Mudbugs) ---------- 1995 300FW (webcamshaft, 350 rear end)
2008 420FE (26x9x12 BearClaws) -------------------
1988 300 (old stock machine, nothing fancy)
2009 420FA (25x8/10x12 BearClaw HTR) ---------
1987 350D (work in progress)

toodeep is offline  
post #3 of 17 (permalink) Old 04-26-2019, 07:01 AM Thread Starter
Honda Rider
 
PowerStroke70's Avatar
 
Join Date: Apr 2019
Posts: 19
Yes sir too deep, it won't get the rpm's at all, just bogging out and zero ass for lack of better terminology. The throttle cable is new within the year, Honda factory as well, she stays inside in the shop so no dirt dobbers or anything like that. It gets used I guarantee ya that lol and can promise nothing gonna build a home in, on or anywhere near it lol. Everything was blown out after the sonic bath and a spray of carb cleaner through everything followed by a shot of compressed air. Exhaust is good, actually sounds amazing idling and running, just no C.O. Jones man, weird. That's why I say it's gotta be something simple. What else ya got up that long time sleeve of yours? Jeep spoke highly of ya so I know I'm in good hands and appreciate your help and advice.
PowerStroke70 is offline  
 
post #4 of 17 (permalink) Old 04-26-2019, 08:02 AM
Honda Lover
 
Join Date: Jul 2018
Location: WV
Posts: 272
Maybe remove the muffler and try it, it's old enough for something to break loose and clog the exhaust.


Is it getting full throttle? See if the carb actually opens up all the way. Is the slide stuck?
Moccasin Ranger is offline  
post #5 of 17 (permalink) Old 04-26-2019, 08:10 AM
Honda Addict
 
Join Date: Nov 2018
Location: South Texas
Posts: 126
I had a similar problem with mine. Stopped and talked with a few guys on the trail and they we were talking about our rides and I said I like the older ones because they are easier to work on without all the electronics, they thought I said better. Started it up and went up the hill fine, got to the top and bogged down so bad wouldn't even run on flat ground, idled great, started immediately every time I tried. Had to get them to tow me home, took the carburetor off and cleaned it and it runs great again. I'm not familiar with your carburetor but mine and my honda pressure washer carbs have a jet in the middle of where the bowl is that has a real small opening. You can remove it with a flat head but it's brass so be careful and get a good grip on it the first time or it will chip and break. By cleaning that, it fixes my pressure washer every year after sitting. Not sure where the obstruction was on the carb. on my atv but after cleaning it, I got full power again. Good luck.


One extra little thing, when I tried to rev it up in neutral, it still bogged down and almost died.

2007 Foreman 500FM
Wilbur is offline  
post #6 of 17 (permalink) Old 04-26-2019, 11:12 AM Thread Starter
Honda Rider
 
PowerStroke70's Avatar
 
Join Date: Apr 2019
Posts: 19
Well, I just rebuilt the carb with a new Shindy kit and ran it through a couple cycles in my sonic cleaner before putting it back together initially. Then yesterday I took it off the wheeler and stripped it back down and in the sonic again with all the brand new jets and everything, blew it out, carb cleaner through everything, put it all back together and it had a few little pieces of trash when I took it off but after I got it back together it did ok after adjusting the pilot jet but just not quite there.
I know everything is clean as a whistle with an new inline filter, new fuel line and everything, so I'm missing something little and gonna feel dumb as dirt when it gets figured out! More so than I already do now LMAO! I've got great spark, new NGK plug, perfect fuel flow, the while 9 yards which just bumfuzzles the fire outta me!
PowerStroke70 is offline  
post #7 of 17 (permalink) Old 04-27-2019, 07:41 AM
Honda Lover
 
Join Date: Jul 2018
Location: WV
Posts: 272
Your carb is a CV type, which means the slide is vacuum operated and a butterfly valve is your throttle opening.


Check to see if the butterfly opens all the way, and the slide is not stuck or it's diaphragm compromised in some way. Often, when the diaphragm/slide is removed, it doesn't get reinstalled correctly, causing it not to seal. The diaphragm has to be seated correctly between the top cover and the carb body.


With the diaphragm removed, you can flex it in front of bright light to check for cracks.


Edit: There's also the lift test. You lift the slide and then drop it. The slide should fall with some resistance and you should hear a woosh of air. If it drops like a rock, there's a problem with the diaphragm.

Last edited by Moccasin Ranger; 04-27-2019 at 07:43 AM.
Moccasin Ranger is offline  
post #8 of 17 (permalink) Old 04-27-2019, 10:01 AM
Honda Addict
 
Join Date: Nov 2018
Location: South Texas
Posts: 126
Quote:
Originally Posted by Moccasin Ranger View Post
Your carb is a CV type, which means the slide is vacuum operated and a butterfly valve is your throttle opening.


Check to see if the butterfly opens all the way, and the slide is not stuck or it's diaphragm compromised in some way. Often, when the diaphragm/slide is removed, it doesn't get reinstalled correctly, causing it not to seal. The diaphragm has to be seated correctly between the top cover and the carb body.


With the diaphragm removed, you can flex it in front of bright light to check for cracks.


Edit: There's also the lift test. You lift the slide and then drop it. The slide should fall with some resistance and you should hear a woosh of air. If it drops like a rock, there's a problem with the diaphragm.
True.....and the diaphragm has a little ear on it that has to be turned a certain way to fit in the groove made for it where the metal cover with four bolts is placed on top.

2007 Foreman 500FM
Wilbur is offline  
post #9 of 17 (permalink) Old 04-27-2019, 10:47 AM Thread Starter
Honda Rider
 
PowerStroke70's Avatar
 
Join Date: Apr 2019
Posts: 19
Everything in the carb is new from Shindy and the diaphragm from Honda and was checked before installing for pin holes, cracks or any other defects. It doesn't just fall in and I heard air when I tried it as suggested so that's good. There's a little tab in the carburetor where it sits and all of that is correct as well. This isn't my 1st time working on this ol gal by any means but the 1st time I've ever had an issue that I couldn't solve by process of elimination, reading the Honda manual or sleep on it and something else comes to mind to check. I'm not one that ever gives up but I'm about to burn it to the ground 😤 I know it's something simple, gotta be as I've went from top to bottom trouble shooting, manual, checking, re checking, manual, take it off again and check diaphragm 3 times, I mean dang! I'm just frustrated as all get out and refuse to be beaten but geeze! She's about to get the best of me as bad as I hate to admit it.
PowerStroke70 is offline  
post #10 of 17 (permalink) Old 04-27-2019, 08:07 PM
Honda Lover
 
Join Date: Jul 2018
Location: WV
Posts: 272
That sends me back to the muffler. Or checking the ignition timing with a light to see if the CDi has gone batty. And see if the carb butterfly is opening fully with the throttle cable.
Moccasin Ranger is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda Foreman Forums : Rubicon, Rincon, Rancher and Recon 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



Similar Threads
Thread Thread Starter Forum Replies Last Post
94 trx 300 fw oil plug issues St. Benard Vintage Honda 8 10-23-2012 01:53 PM
94 300 wildfireman Vintage Honda 0 05-17-2012 12:34 PM
plastic swap 88 - 94 Sterkview_dairy Vintage Honda 2 03-22-2011 10:32 PM
94 polaris 400L 4x4 -- PROJECT honda_rider_ky Other 4 wheelers and bikes 0 10-12-2009 05:37 PM
Marlin model 336 or Winchester model 94? Jordan P Off Topic 7 08-25-2007 11:46 PM

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