Rieju & GasGas Legacy Riders Club Forum  

Go Back   Rieju & GasGas Legacy Riders Club Forum > GasGas Enduro Technical Forums > Enduro Product Reviews

Enduro Product Reviews Feedback & Comments on Products Tested


Reply
 
Thread Tools Display Modes
  #11  
Old 10-05-2014, 10:43 AM
Buysomerice's Avatar
Buysomerice Buysomerice is offline
Gold Level Site Supporter
 
Join Date: Jan 2014
Location: St Louis MO
Posts: 185
Default

This great! Thanks for all the details and pics!


Reply With Quote


  #12  
Old 10-06-2014, 02:24 AM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

Quote:
Originally Posted by Buysomerice View Post
This great! Thanks for all the details and pics!
No worries. More to follow.

Todays activites included removal of the power valve. Port matching and cleaning of the exhaust port to manifold and cleaning up the casting flaws in the transfers. Then a good clean and deglazing of the cylinder. Happy days.
Reply With Quote
  #13  
Old 10-06-2014, 04:13 AM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

Parts on the ready (seals and gaskets, pistons and little end)


Quick pic of the head


Removed the powervalve
Reply With Quote
  #14  
Old 10-06-2014, 04:16 AM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default Port matching the exhuast to the spigot

Stock there was several mm of excess lip where the exhaust and spigot didn't match up. Remembered to snap a shot just after I started work.


After some work things started to take shape


And near enough, is good enough
Reply With Quote
  #15  
Old 10-06-2014, 04:21 AM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

Stock transfers didn't look too bad. Few small casting defects in places.




And again, after a little touch up. I'd have liked to worked into the ports deeper but access is tight with the tooling, and getting too close to the coating isn't a great idea.


Reply With Quote
  #16  
Old 10-06-2014, 04:28 AM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

And last shots for the day. Couple of the cylinder after a scrub up.


Nice coffee cup






Next jobs
Clean the power valves
Decide which piston to use (A or B) - Leaning towards an A
Clean the head
Spec up the bottom end
The put her back together including fresh crank and countershaft seals.

Probably a few days tinkering there. After that the back end can go back together and the forks and head stem will come off for their turn.
Reply With Quote
  #17  
Old 10-06-2014, 06:08 AM
Moto7man Moto7man is offline
Member
 
Join Date: Aug 2011
Location: Murfreesboro,Tennessee
Posts: 2,537
Default

Nice stuff, thanks for the photos!
__________________
2011 GG EC 300E, 1994 CR 250R, 1984 RM 250 E, 2022 Ranger 300

"If you stop eating donuts you will live 3 years longer. It's just 3 more years that you want a donut."
―Comedian Lewis Black

"I think best when I have a wrench in my hands." Soichiro Honda

"Dreams are messages from the deep."
-Unknown Sardaukar
Reply With Quote
  #18  
Old 10-06-2014, 01:00 PM
(F5)'s Avatar
(F5) (F5) is offline
Gold Level Site Supporter
 
Join Date: Jul 2006
Location: Wellington New Zealand
Posts: 2,063
Default

You could probably bring those aux ex port tunnels out to the spigot or even into it as they are shrouded and blow down is important. Don't be tempted to remove any material from the main port tunnel, it already looks too big. Might have a good look when mine is off next month.
__________________
'07 EC300 GG
'14 TXT250 GG
'? 496 CPI Cheetah RZ/RGV hybrid
'22 765 Street Triple RS
'21 XTrainer
'69 Stinger T125 Suzuki
'23 TRS 250RR (it's a Trials thing)
Reply With Quote
  #19  
Old 10-06-2014, 04:29 PM
Jakobi's Avatar
Jakobi Jakobi is offline
Super Moderator
 
Join Date: Oct 2010
Location: Australia
Posts: 7,994
Default

Quote:
Originally Posted by (F5) View Post
You could probably bring those aux ex port tunnels out to the spigot or even into it as they are shrouded and blow down is important. Don't be tempted to remove any material from the main port tunnel, it already looks too big. Might have a good look when mine is off next month.
Would be great to see what you would do with yours. Good suggestion re bringing the exh port tunnels forward some more. I'll probably leave that until next time, but depending on how I feel I may crack it now.

I had no desire to increase the size of the main exhaust port any more than required to match the spigot. Some material had to be removed during the process. No intent to make it any bigger.

Quick question - how does the relationship between port window (in cylinder) vs port volume influence engine performance? Thats before you start to bring angles into the equation.
Reply With Quote
  #20  
Old 10-06-2014, 09:13 PM
twowheels's Avatar
twowheels twowheels is offline
Senior Member
 
Join Date: Oct 2009
Location: Dearborn MI
Posts: 1,860
Default

Great work Jake. I've got a couple bikes that need going through - care to do it for the cost of a plane ticket?
__________________
Steven Beane #275
PlusOnePerformance - Superior Service the World Over - Dearborn MI
AMA District 14 (Michigan) Officer

afterhourscycle.com
Michigan's Beta and TM Race Headquarters
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
2013 ec250r Jakobi Enduro Product Reviews 163 02-21-2016 03:52 AM
EC200 Review and 2-day ride report firffighter Ride Reports 6 05-06-2014 01:38 AM
2013 ec250r Jakobi Enduro Intake/Carburetion - 2 stroke 2 04-17-2014 08:08 PM
Anyone got a review of the 2013 race with the new barrel Simmo737 General Discussions & Announcements 13 02-03-2013 04:08 PM
brushy ride review, bike review, Add on parts review Mazikeen SouthEast United States 6 09-04-2012 05:34 PM




All times are GMT -5. The time now is 08:28 AM.


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