Rieju & GasGas Legacy Riders Club Forum  

Go Back   Rieju & GasGas Legacy Riders Club Forum > GasGas Enduro Technical Forums > Enduro Engine - 2 stroke

Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


Reply
 
Thread Tools Display Modes
  #1  
Old 03-04-2021, 05:11 AM
Booki Booki is offline
Member
 
Join Date: Feb 2019
Location: Australia - Melbourne
Posts: 41
Unhappy Bottom end failure - 2018 EC300

Was riding my EC300 the other week and my rear wheel locked up on me!

Immediately I thought oh f$%^ - Managed to start it and she sounded absolutely horrible with a grumbling/rumbling noise from the bottom end. Not good!

It got me to a main road and got my riding buddies to get the car and pick me up for tow home.


Have removed the engine from the bike and started stripping it down, top end looks great (bike has 101 hours), but have realised I need a flywheel puller to continue my inspection of the bottom end.

Does anybody have one?

This flywheel bolt was a right hand thread, I believe its a 27mm x 1mm RH puller I need?

Has anybody had their bottom end fail?

Absolutely shattered its failed on me

From my readings there is one particular bearing on the ignition/flywheel side that has a plastic cage? Known failure point?


Reply With Quote


  #2  
Old 03-04-2021, 05:48 AM
Anders's Avatar
Anders Anders is offline
Gold Level Site Supporter
 
Join Date: Nov 2009
Location: Kongsberg, Norway
Posts: 1,113
Default

Quote:
Originally Posted by Booki View Post
Was riding my EC300 the other week and my rear wheel locked up on me!

Immediately I thought oh f$%^ - Managed to start it and she sounded absolutely horrible with a grumbling/rumbling noise from the bottom end. Not good!

It got me to a main road and got my riding buddies to get the car and pick me up for tow home.


Have removed the engine from the bike and started stripping it down, top end looks great (bike has 101 hours), but have realised I need a flywheel puller to continue my inspection of the bottom end.

Does anybody have one?

This flywheel bolt was a right hand thread, I believe its a 27mm x 1mm RH puller I need?

Has anybody had their bottom end fail?

Absolutely shattered its failed on me

From my readings there is one particular bearing on the ignition/flywheel side that has a plastic cage? Known failure point?
Did you look for lose countersunk M6 bolts in the crankcase? That happened to my 2015 EC200 right before Christmas.
http://www.gasgasrider.org/forum/showthread.php?t=25449

I will pop over to the wokshop and have a look at my extractor in an hour or three and report back. I presume its the same on 2015 and 2018.

Do you have the worksop manual? If not, I can send it to you as a pdf.
__________________
Anders

"So you know, that you're over the hill when your mind makes a promise that your body can't fill" (Little Feat: Old Folks Boogie)

2015 EC200 Racing: TE bars, Rekluse Core Exp 3.0, 38mm Lectron & Ohlins S3 steering damper
2006 EC200: 2011 plastics, Rekluse Z-Start, revalved KYB forks & Scotts steering damper
1998 Bimota Supermono
1986 Duc Mille S2
1975 Guzzi sidecar hack
1961 Morini Corsaro 125
etc
Reply With Quote
  #3  
Old 03-04-2021, 07:24 AM
Gasser Nate's Avatar
Gasser Nate Gasser Nate is offline
Senior Member
 
Join Date: May 2010
Posts: 644
Default

The puller is the same as used on the trials models.
Interested to see what the issue is. Hopefully they have sorted out the loose/ un loctited crank bolts by now...
__________________
Back on a gassy! 2018 EC300! 🤘
Txt 280 07 to make me feel like a gumby again
Reply With Quote
  #4  
Old 03-04-2021, 08:21 AM
Anders's Avatar
Anders Anders is offline
Gold Level Site Supporter
 
Join Date: Nov 2009
Location: Kongsberg, Norway
Posts: 1,113
Default

My puller is a 27x1 rh thread.

Sent fra min YAL-L21 via Tapatalk
__________________
Anders

"So you know, that you're over the hill when your mind makes a promise that your body can't fill" (Little Feat: Old Folks Boogie)

2015 EC200 Racing: TE bars, Rekluse Core Exp 3.0, 38mm Lectron & Ohlins S3 steering damper
2006 EC200: 2011 plastics, Rekluse Z-Start, revalved KYB forks & Scotts steering damper
1998 Bimota Supermono
1986 Duc Mille S2
1975 Guzzi sidecar hack
1961 Morini Corsaro 125
etc
Reply With Quote
  #5  
Old 03-05-2021, 01:31 PM
Niall-griffiths's Avatar
Niall-griffiths Niall-griffiths is offline
Gold Level Site Supporter
 
Join Date: Feb 2014
Location: Bury st Edmunds (Suffolk)
Posts: 123
Default

Not much help but a lot of the 2018/2019 models for sale in the uk have had the main bearings replaced between 50/150 hours . Seems common
Reply With Quote
  #6  
Old 03-05-2021, 04:50 PM
Gasser Nate's Avatar
Gasser Nate Gasser Nate is offline
Senior Member
 
Join Date: May 2010
Posts: 644
Default

What?? Mains at 50 hours? That is definitely not common. Every bike I have owned gets way more than that out of mains. Must be drowning the things or something. Current ride has over 160 on stock mains and my mate we go riding with has around 560 hours on stock mains and crank that are only now getting a little grumbly.
I usually replaced them after 300-400 hours when the rod is showing a little play.
__________________
Back on a gassy! 2018 EC300! 🤘
Txt 280 07 to make me feel like a gumby again
Reply With Quote
  #7  
Old 03-06-2021, 08:01 AM
Booki Booki is offline
Member
 
Join Date: Feb 2019
Location: Australia - Melbourne
Posts: 41
Default

Interesting, well so far can confirm the flywheel thread is infact a 27mm x 1mm RH thread - have the tool on order so will need to wait for that to come in before I can tear down further.

I do have some photo's of the piston I am going to post up shortly.
Reply With Quote
  #8  
Old 03-06-2021, 08:07 AM
Booki Booki is offline
Member
 
Join Date: Feb 2019
Location: Australia - Melbourne
Posts: 41
Default

Quote:
Originally Posted by Anders View Post
Did you look for lose countersunk M6 bolts in the crankcase? That happened to my 2015 EC200 right before Christmas.
http://www.gasgasrider.org/forum/showthread.php?t=25449

I will pop over to the wokshop and have a look at my extractor in an hour or three and report back. I presume its the same on 2015 and 2018.

Do you have the worksop manual? If not, I can send it to you as a pdf.
I have a workshop manual, I wonder if I hvae the same one as you?
2018 GasGas workshop Manual E300.pdf - 9.37mb

Not very detailed for a workshop manual (compared to say a Yamaha manual) hows yours?
Reply With Quote
  #9  
Old 03-06-2021, 08:16 AM
Booki Booki is offline
Member
 
Join Date: Feb 2019
Location: Australia - Melbourne
Posts: 41
Default

Have a look and see what you think -

https://imgur.com/a/TOzzYSk
Reply With Quote
  #10  
Old 03-07-2021, 10:05 AM
blitz11's Avatar
blitz11 blitz11 is offline
Silver Level Site Supporter
 
Join Date: Oct 2006
Location: SW Montana
Posts: 702
Default

I think that you must be a much better rider than am I.

I had 440 hours on my piston (bottom end hours unknown - but tight with just a bit of polish on the small end of the rod), but i rarely ride it on the pipe, and most of that time was riding behind my daughters (both of whom are now faster than I am). My piston has much less ring-blow by, the bottom of the piston was shiny clean, and I had no scoring or "abrasions."

My guess is that you might have had a less than ideally sealed air filter, bad air filter (i had an air filter split on the outer layer once - ouch), or really lean oil mixtures. It's hard to say without more information. i could send pictures of the piston if you're interested.

Dirt might explain a bottom end failure, too. Hard to say for sure w/o the tear down.
Reply With Quote
Reply



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
2018 ec300 cdi Demi Parts 0 02-13-2021 12:36 PM
2019 ec300 start failure Ashmy19gasgas Enduro Engine - 2 stroke 22 09-24-2019 11:21 AM
2018 ec300 J. JuJu General Discussions & Announcements 3 07-17-2018 05:35 AM
2018 ec300 Fieds83 Enduro Engine - 2 stroke 11 07-11-2018 09:40 AM
main bearing failure right side 2006 ec300, rebuild tips needed. hillbilly Enduro Engine - 2 stroke 11 03-16-2012 04:42 PM




All times are GMT -5. The time now is 12:52 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright 2009 - GasGasRider.org