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 10-30-2019, 05:18 PM
TGM_OFFROAD TGM_OFFROAD is offline
Senior Member
 
Join Date: Aug 2019
Posts: 117
Default 18 XC300 possible detonation

Hey everybody I have an 18 XC300 that I recently had to rebuild. I had a leaky left side crank seal that caused a lean condition and melted a hole in the piston. I just finished the rebuild and I am noticing what to me sounds like some detonation at about 1/8 to 1/4 throttle when holding it steady. I also notice it every once in a while when chopping the throttle. It is just a singular knock. I currently am running with an RK tek head supposedly set up for 91 octane, lectron carb which is adjusted slightly rich with a 4-2 metering rod. I am really paranoid and don't want to have to rebuild my motor again and am kind of lost on what to do other than run race gas which I havent tried yet. Is this possibly caused by ignition timing? I didnt see a way to easily change timing on the bike and there is nothing in either manual about it.


Reply With Quote


  #2  
Old 10-31-2019, 10:07 AM
Greatdane Greatdane is offline
Member
 
Join Date: Oct 2018
Posts: 18
Default

Did you use a thinner base gasket when you did your top end? I pit the thinnest base gasket available in mine to boost low end grunt, but noticed a slight occasional detonation when letting of the throttle.
Reply With Quote
  #3  
Old 10-31-2019, 11:43 PM
TGM_OFFROAD TGM_OFFROAD is offline
Senior Member
 
Join Date: Aug 2019
Posts: 117
Default

The gasket kit I ordered only had one base gasket and I am unsure of the thickness but it was the same as far as I could tell as the original one I removed
Reply With Quote
  #4  
Old 11-01-2019, 08:44 AM
arminhammer arminhammer is offline
Senior Member
 
Join Date: Jun 2011
Posts: 184
Default

Pipe bang is a rich condition not a lean one.
Reply With Quote
  #5  
Old 11-01-2019, 10:24 AM
nknudsen's Avatar
nknudsen nknudsen is offline
Senior Member
 
Join Date: Oct 2012
Location: SE Minnesnowta
Posts: 722
Default

I've had detonation like sounds on deceleration before. I tried jetting, needle position etc.. It ended up that the slide was set too high with the idle screw. Moral of my story is get the bike to idle with the slide as low as possible.
__________________
Noah
2000 EC250 with 2011 transformation kit, KYB SSS forks, MN street title
16' Ski-Doo XS Renegade X 1200 4T
16' Specialized Fatboy trail
02' ZRX 1200r R.I.P.
72' Olds 500ci, Batten Heads, Street/Drag car, former CarCraft magazine centerfold (has-been)
15' TW200
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
Detonation on deceleration adriano.ro Enduro Intake/Carburetion - 2 stroke 7 12-15-2017 02:42 AM
What exactly does detonation or pre-ignition sound like? GGRider01 Enduro Engine - 2 stroke 9 04-24-2016 04:09 PM
Detonation, timing, and jetting pscook Enduro Intake/Carburetion - 2 stroke 13 05-01-2012 11:48 PM
Detonation - cause? 3hunerd Enduro Engine - 2 stroke 10 03-19-2012 11:22 PM




All times are GMT -5. The time now is 05:27 AM.


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