Need help and Advice on pulling an SX motor out of its frame.

[Tri-ZNate]

The last time I did this my neighbor did most of the work and we pulled the drive shaft out of the engine causing all the gears to fall out of place so what I need to know is...

1. how many mounting brakets hold the engine in?
2. where should the drive shaft be separated at?
3. how many bolts hold the head on?
4. is there any electrical, mechanical, ect... that i need to unhook before I take it out? I already know to unhook the carb boot and oil cooler.

[Dirtcrasher]

The last time I did this my neighbor did most of the work and we pulled the drive shaft out of the engine causing all the gears to fall out of place so what I need to know is...

1. how many mounting brakets hold the engine in?

There are front brackets, top brackets and frame mounts.

2. where should the drive shaft be separated at?

Slide back boot and pry off splines


3. how many bolts hold the head on?

A bunch of 8MM head bolts


4. is there any electrical, mechanical, ect... that i need to unhook before I take it out? I already know to unhook the carb boot and oil cooler.

There is no oil cooler. Starter positive and ground are connected along with a plug from the ignition side. A reverse and nuetral plug.

Reverse cable and foot pegs too.

That engine is HEAVY and a tight fit too. Rolls out the right side, good luck!

[MTS]

Are you sure your timing chain just didnt pop off befor you pull the whole motor?

[Tri-ZNate]

Are you sure your timing chain just didnt pop off befor you pull the whole motor?

I have no compression

[MTS]

I have no compression

yes and a timing chain would cause that if one or more valves stuck open.

[Tri-ZNate]

There is no oil cooler.

what is the line running up to the right side of the head? It starts on the right top of the engine and runs up there.

Rolls out the right side

so I have to take the exaust pipe off to?

[Tri-ZNate]

yes and a timing chain would cause that if one or more valves stuck open.

All I want to do is look at the piston which means the head had to come off, which means I could look at the chain, but there isnt enough room to get all the head bolts off because of the lack of room. So i have to take the engine out.

[MTS]

yes and a timing chain would cause that if one or more valves stuck open.

I say this becuse motors just dont all of a sudden have no compression from a 2 second ride if it was fine the day before(normally lol) what im thinkin is your mom was usin the elcltricstart and it startted and she kept on the electric start button and it coulda back fire'd n sent the timin chang flyin (if it was loose)...just my 0.2 cents...could save you time to check it! , you can just pop the pulse rotor cover off and see if the chain is still on and tight, takes like 5 mins..

[Tri-ZNate]

I say this becuse motors just dont all of a sudden have no compression from a 2 second ride if it was fine the day before(normally lol) what im thinkin is your mom was usin the elcltricstart and it startted and she kept on the electric start button and it coulda back fire'd n sent the timin chang flyin (if it was loose)...just my 0.2 cents...could save you time to check it! , you can just pop the pulse rotor cover off and see if the chain is still on and tight, takes like 5 mins..

oh so i dont need to take the head off?

[MTS]

oh so i dont need to take the head off?

...you dont have to take the head off, just the rocker cover, hell to make it really easy yto see whats goin on just take the valve adjustment caps off and crank it over see if your valves move, if they dont you know its a cam chain.

[Tri-ZNate]

are the caps on the head? and I just got done reading the 350X ticking thread and mine was ticking for a while and it still was up till yesterday. I see one of the replys is a loose timing chain. So I hope its just that simple.

[MTS]

yes they should be on the head. up there someware..lol

[BIGCRIP28]

that line running from the crankcase to the head is not for a oil cooler it is just to get more oil up to the head instead of going through like the 200 engines.

[Dirtcrasher]

There are quite a few possible reasons for no compression - snapped connecting rod, broken crank, broken cam, sheared timing chain sprocket key or bolts in the upper sprocket and so on. Simply remove the 2 - 8mm bolts holding the cam chain tensioner in place and if it pops out 1/4 of an inch then the chain isn't snapped. Generally the head gets pretty noisy if the chain is on the way out. I too would remove the valve cap cover and check out the cam etc (there is no pulse generator cover with t chain access) The book says that the rocker arm cover comes off in the frame but I had difficulty in removing mine. I had a dowel pin stuck in the head which prevented it from slipping off so I just yanked the motor.

[Tri-ZNate]

i took the valve covers off and the valves are moving just fine. SO i dunno whats wrong.