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 09-02-2008, 09:46 PM
Hollywood Hollywood is offline
Member
 
Join Date: Mar 2008
Location: Calgary
Posts: 46
Default 300 EC RPM limit?

What is the RPM limit of the 300's?


Reply With Quote


  #2  
Old 09-03-2008, 07:59 AM
widebear's Avatar
widebear widebear is offline
Banned
 
Join Date: Nov 2006
Location: Kamloops B.C.
Posts: 723
Default

Imagine that depends on the comp ,timing , pipe and weight of the piston.
Reply With Quote
  #3  
Old 09-03-2008, 08:18 AM
Eric K Eric K is offline
Senior Member
 
Join Date: Jul 2006
Posts: 546
Talking

I have revved my '06 EC300 to just over 10000 RPM a number of times with no damage. With a 2 stroke you will find the power falls off when you rev it very high.

Take a look on p 59 in the Aug 2008 MotocrossDigital.com at the dyno charts for the '09 300 and 250 where you can see the max dyno reading at 9800 RPM. It is also interesting to note the 300 consistently produces more power than the 250 at any RPM above 8600 RPM.

The 300 has awesome power delivery.
__________________
Eric K
'06 GasGas EC300
'01 GasGas XC300
Reply With Quote
  #4  
Old 09-03-2008, 06:39 PM
Hollywood Hollywood is offline
Member
 
Join Date: Mar 2008
Location: Calgary
Posts: 46
Default

Mine is 9600, I thought it was a little short. Is the limit in the CDI or is that the safe spot for the internals?

I took out the reeds spacer and switched to 70:1 (opti-2), tuned the air screw, quite a bit out. I have a JD jet kit. My bike has opened up but I still find when I hit the meat of the pipe or ladder rpms it falls short of the power it should make, also feels the top end pull is lacking and not running properly.
Reply With Quote
  #5  
Old 09-04-2008, 09:25 AM
Loosenut's Avatar
Loosenut Loosenut is offline
Senior Member
 
Join Date: Aug 2006
Posts: 273
Default

I have bounced my Gassers off the rev limiter many times, but only because shifting would be sketchy at best.

My 2000 EC/XC 300 has never been a rever. My 2005 EC300 was a screamer by comparison and more so on the dry ignition setting. With the higher compression on the cut head, the bike lost some revs, but gain so much power elsewhere that it doesn't matter.
__________________
Mike Baxter

2005 GasGas EC300 (Ohlins front and rear)
2007 Yamaha FZ1
2003 Pampera 280(hers)
Reply With Quote
  #6  
Old 09-04-2008, 09:26 PM
Hollywood Hollywood is offline
Member
 
Join Date: Mar 2008
Location: Calgary
Posts: 46
Default

Well you know the feeling when u hit the limiter? Well when I hit my top end it feels like that just not as bad, like its too rich. Supposedly my jetting is on as it was done by the dealer, but could my float be set wrong by the factory? Or the timing even? Or factory power valve issues? Or is that normal for the 300's?

I'm sensative to these things because my old YZ and WR were spot on with throttle response and jetting and I fell my gasser is not quite in the same place.
Reply With Quote
  #7  
Old 09-05-2008, 06:41 AM
Eric K Eric K is offline
Senior Member
 
Join Date: Jul 2006
Posts: 546
Default

First off, I would run more oil. With more oil the rings seal better and tend to last longer. I run about 40:1.

Second, check the float level and tune the jetting. I am not familiar with what JD jetting provides for GasGas. At full throttle, you are primarily on the main jet. It sounds like you may be too rich. You may want to try stepping down the main jet size.
__________________
Eric K
'06 GasGas EC300
'01 GasGas XC300
Reply With Quote
  #8  
Old 09-09-2008, 04:44 PM
dionysis dionysis is offline
Member
 
Join Date: Jul 2007
Location: Colorado
Posts: 28
Default

I would look into two things, one is jetting, a rich main will act like a rev limiter but sputter more when rich. The other is what pipe you have. Because you can control your RPM's with a pipe I haven't seen a 2 stroke CDI box to actually have a rev limiter. (Could be wrong though)

Different pipes rev differently, this is due to the leading taper. When you hit the pipe limit though it is like you just turned off the bike or started pushing the kill switch while in gear, far more significant change in my experience than being rich on the main. I recently had a Honda that the stock pipe on it limited me to about 7500-8000 RPM's, I changed the pipe to a FMF desert pipe and then I could rev to 9000 RPM's. (500cc's didn't like going much above that without some work.)
__________________
69 Rickman 250
79 CanAm 370 Qualifier
98 GG EC250 ISDE
99 GG 250 Pampera
00 GG EC250
03 KTM 125SX
05 GG EC200
98 GG TX 270
85 Honda XR350
Reply With Quote
  #9  
Old 09-10-2008, 12:22 AM
Hollywood Hollywood is offline
Member
 
Join Date: Mar 2008
Location: Calgary
Posts: 46
Default

Quote:
Originally Posted by dionysis View Post
I would look into two things, one is jetting, a rich main will act like a rev limiter but sputter more when rich. The other is what pipe you have. Because you can control your RPM's with a pipe I haven't seen a 2 stroke CDI box to actually have a rev limiter. (Could be wrong though)

Different pipes rev differently, this is due to the leading taper. When you hit the pipe limit though it is like you just turned off the bike or started pushing the kill switch while in gear, far more significant change in my experience than being rich on the main. I recently had a Honda that the stock pipe on it limited me to about 7500-8000 RPM's, I changed the pipe to a FMF desert pipe and then I could rev to 9000 RPM's. (500cc's didn't like going much above that without some work.)
I have the factory 07 gasser pipe, stamped with gas gas. Main could be rich I guess, I never set it.
Reply With Quote
  #10  
Old 09-10-2008, 07:59 AM
Eric K Eric K is offline
Senior Member
 
Join Date: Jul 2006
Posts: 546
Default

Quote:
Originally Posted by Hollywood View Post
I have the factory 07 gasser pipe, stamped with gas gas. Main could be rich I guess, I never set it.
The stock GG pipe allows the engine to rev nicely.

You main jet is most likely the issue. Changing the main jet is not that difficult.
__________________
Eric K
'06 GasGas EC300
'01 GasGas XC300
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





All times are GMT -5. The time now is 10:01 AM.


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