Honda trx 350D (1992) General engine work help - Honda ATV Forum
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post #1 of 18 (permalink) Old 08-10-2019, 04:52 PM Thread Starter
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Honda trx 350D (1992) General engine work help

Hi,

I need some help/guidance on removing the crankcases from the engine on my 92 trx 350d. Is there anything I need to be careful or be mindful of when removing them? Or is it just as simple as unbolting them and sliding them off? Also is it possible to do this with the engine still in the bike?

Thanks
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post #2 of 18 (permalink) Old 08-10-2019, 05:19 PM
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You mean the side cases Pip?

The left sidecase seemed easy for me to remove when i changed the stator. The manual gives a great step by step except for some things:
When you pull the starter gears don’t drop the washer down into the case. Notice the gear types as you pull them out they are all different

It shows you to use a big screwdriver and a rag to back out the front drive shaft. This is to protect the cover from scratches

It doesn’t tell you to drain the engine oil before you pull off the gear drive unit.

And it doesn’t tell you to push in on the gear selector shaft when you get to remove the cover. If the shaft backs out when you pull the cover loose, then your gear selector may not go back in or your shift pattern may be off. Then you have to take off the right side.

There’s no torque value listed for the cover bolts—i only went snug and then 15-30 inch pounds. Inch pounds that’s like not even 2 foot pounds
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post #3 of 18 (permalink) Old 08-10-2019, 05:24 PM
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To part the crankcase you need the engine out and on a work bench, side cases can be removed with the engine in situe.

See @Goober link at the bottom of his reply for service manuals :-)
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post #4 of 18 (permalink) Old 08-10-2019, 06:33 PM
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WORD OF CAUTION !!. IF you are splitting the main cases ?..make sure you have the engine facing the correct way before you split them ?..otherwise, your going to have a mess with your tranny gears falling out..lol. yes, the engine must be out of the frame in order to split the cases !.
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post #5 of 18 (permalink) Old 08-11-2019, 04:23 AM Thread Starter
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@Goober yes sorry, I meant the side cases. I need to get the left side case off.
Thanks guys
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post #6 of 18 (permalink) Old 08-11-2019, 07:11 AM
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Quote:
Originally Posted by Pip Whittaker View Post
@Goober yes sorry, I meant the side cases. I need to get the left side case off.
Thanks guys
Ok great.
Also there are two “dowels,” or metal spring pins, used to line up both the starter gear and the side case cover. Don’t break them or you might break the cover.

Work the covers off gradually until you can get a wide flat screwdriver tip between the mating surfaces and pry them loose. You will probably need to order a gasket.

My starter cover gasket had a chunk out of it so now crankcase pressure vents out a little at the top of the cover thankfully no oil!
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post #7 of 18 (permalink) Old 08-11-2019, 09:23 AM
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Here’s pics of the removed cover and results of my stator testing. Yours will look a lil different because you have a D model–yours has no exciter coil wire like the A model .

Be very careful when removing the old gasket you don’t want to scratch that case edge too deeply.
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post #8 of 18 (permalink) Old 08-13-2019, 01:55 AM Thread Starter
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Quote:
Originally Posted by Goober View Post
Here’s pics of the removed cover and results of my stator testing. Yours will look a lil different because you have a D model–yours has no exciter coil wire like the A model .

Be very careful when removing the old gasket you don’t want to scratch that case edge too deeply.
Thanks for those tips @Goober, much appreciated! I haven't got round to it yet, but I'm sure it'll go smoothly. Fingers crossed lol

I have another question though (kind of engine related lol). I need a battery for the bike. I'm wondering what specifications I need to get? Just any 12v battery?
Thanks
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post #9 of 18 (permalink) Old 08-13-2019, 08:47 AM
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Quote:
Originally Posted by Pip Whittaker View Post
Quote:
Originally Posted by Goober View Post
Here’s pics of the removed cover and results of my stator testing. Yours will look a lil different because you have a D model–yours has no exciter coil wire like the A model .

Be very careful when removing the old gasket you don’t want to scratch that case edge too deeply.
Thanks for those tips @Goober, much appreciated! I haven't got round to it yet, but I'm sure it'll go smoothly. Fingers crossed lol

I have another question though (kind of engine related lol). I need a battery for the bike. I'm wondering what specifications I need to get? Just any 12v battery?
Thanks
Battery from the factory was a Yuasa YTH14-128
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post #10 of 18 (permalink) Old 08-13-2019, 11:02 PM
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i got a YTX14, on the 450es, i like it.. ya gotta shop around. mind was from "impact battery".,, i'm sure you might get a better deal..

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Last edited by LedFTed; 08-13-2019 at 11:05 PM.
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