ADVrider

Go Back   ADVrider > Bikes > Old's Cool > 2 smokers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-20-2013, 10:54 PM   #196
mudmantra OP
Gnarly Adventurer
 
Joined: Jul 2009
Location: Humboldt
Oddometer: 335
Quote:
Originally Posted by anotherguy View Post
You think the 490 has an abrupt delivery you should ride one of these. That is if there are any left in one piece.


I know where one's at. I think it's still for sale too. The story I got about these things being so dangerous, was the CDI was unstable. It would go to full advance at the odd times, like starting, halfway into a slide, or any other time it could do the most damage to the rider.
mudmantra is offline   Reply With Quote
Old 11-21-2013, 06:07 AM   #197
anotherguy
Banned
 
anotherguy's Avatar
 
Joined: Jun 2009
Location: the hills
Oddometer: 6,212
Ignitech CDI.
anotherguy is offline   Reply With Quote
Old 11-21-2013, 06:25 AM   #198
KX50002
NooB, my ass
 
KX50002's Avatar
 
Joined: Mar 2012
Location: NEPA
Oddometer: 1,804
OK, my dad's was a 75, I also had a 75 TM 100 I think it had like 10 hp at 70,000 prm it was very pipey and hard to ride, I loved it.
I wish I still had both of them.
__________________
SOTGMOTT Some Of The Gear Most Of The Time
KX50002 is offline   Reply With Quote
Old 11-21-2013, 10:59 PM   #199
mudmantra OP
Gnarly Adventurer
 
Joined: Jul 2009
Location: Humboldt
Oddometer: 335
Quote:
Originally Posted by anotherguy View Post
Interesting. Have you ordered anything from them? If it's all legit, then they might be the answer for another machine I have.
mudmantra is offline   Reply With Quote
Old 11-22-2013, 06:34 AM   #200
anotherguy
Banned
 
anotherguy's Avatar
 
Joined: Jun 2009
Location: the hills
Oddometer: 6,212
Yeah I built a supercharged Valkyrie for a guy and at 9.8:1 compression and 7 pounds of boost the advance curve needed adjustment to say the least. They built me a custom plug and play adjustable ignition w/boost sensor (scary drilling a big hole in that plenum) that accessed 10 separate curves depending on manifold pressure. Took some sorting on the dyno but it did a great job. Customer service is good but slow sometimes due to English being a second language on the other end but they helped me sort out a few bugs easily. Oh and delivered from the Czech Republic it cost under $300 w/software. And it did plug right in.

In fact I'm thinking about one on my RZ350 with a programmable powervalve set-up. Buy with confidence.
anotherguy is offline   Reply With Quote
Old 11-23-2013, 10:58 PM   #201
mudmantra OP
Gnarly Adventurer
 
Joined: Jul 2009
Location: Humboldt
Oddometer: 335
Thanks. I'm going to try another CDI I have first. It's going on a first year BW200. It has a CDI that was plagued with problems. I see they might offer a TW200 CDI, that might be close enough to do the job. I read in a cycle test that the 1980 YZ465 CDI was Improved for better starting in 1981. I don't know how true that is. That same improved CDI was used on the 1982 YZ490. My 1980 YZ465 and YZ490 start the same. If you have your act together they start easy, if you don't, you better be ready for some punishment.
mudmantra is offline   Reply With Quote
Old 03-05-2014, 09:28 PM   #202
Racerjoe
n00b
 
Racerjoe's Avatar
 
Joined: Jun 2010
Oddometer: 4
Quote:
Originally Posted by mudmantra View Post
I sent the cylinder, cylinder head and new Wiseco piston to Forward Motion. I was told that the wider smoother more better powerband, was the best running for the YZ490. I couldn't find any reviews on big bore 2 strokes with this porting. But I found a lot of 250 and 300's, with the Mo betta porting. Sounded like it added some grunt down lower, with smoother power up to, or past were the old power band ended. The 490 already had loads of grunt, so this sounded like the way to go. I might not need so much low end grunt, that I loop the bike every time I touch the throttle.

Sooo... Have you gotten them back? How did it work? I have a WR 500 that I was thinking about sending.. been reading your thread and wanting to hear the results.

__________________

Racerjoe
Joined June 10, 2010
1991 Goldwing, 2002 XR 650L, 1992 WR 500,
1981 IT 250, XR 80

Racerjoe screwed with this post 03-05-2014 at 09:35 PM Reason: added bike pic
Racerjoe is offline   Reply With Quote
Old 03-05-2014, 09:38 PM   #203
Racerjoe
n00b
 
Racerjoe's Avatar
 
Joined: Jun 2010
Oddometer: 4
Quote:
Originally Posted by anotherguy View Post
You think the 490 has an abrupt delivery you should ride one of these. That is if there are any left in one piece.


Oh that brings back memories.... I rode one of those things one time when I was about 17 years old... it was like I could not keep the front end down.. it was plain wild...
__________________

Racerjoe
Joined June 10, 2010
1991 Goldwing, 2002 XR 650L, 1992 WR 500,
1981 IT 250, XR 80
Racerjoe is offline   Reply With Quote
Old 03-06-2014, 01:58 PM   #204
tommyg
Beastly Adventurer
 
Joined: Oct 2007
Location: petoskey,michigan
Oddometer: 1,327
I worked my way up from a 81yz 80 to a 125, then a 250 all 81 yzs. Used them for trail riding in N. Mi. When I was 20 I figured I was man enough for a used 465, I was wrong that thing hit so hard I found myself on my ass too many times, finally a serious crash with many injuries found it up for sale. Sold to a friend, put him in the hospital first day. Bike made the rounds in my small town, same results everytime. I really miss the 250, great trail bike, wish I still had it.
tommyg is offline   Reply With Quote
Old 07-10-2014, 11:28 PM   #205
athomerecords25
Vintage YZ *****
 
Joined: Apr 2012
Location: Oakley, CA
Oddometer: 99
Quote:
Originally Posted by Racerjoe View Post
Sooo... Have you gotten them back? How did it work? I have a WR 500 that I was thinking about sending.. been reading your thread and wanting to hear the results.

I have had lots of Porting and Head work done on my bikes by Eric Gorr, and I have always loved how things come back, but I would also love to hear what this poster thinks of Eric's work.
athomerecords25 is offline   Reply With Quote
Old 07-14-2014, 10:55 PM   #206
mudmantra OP
Gnarly Adventurer
 
Joined: Jul 2009
Location: Humboldt
Oddometer: 335
I've got the motor back together. But then I decided to paint the frame. At first I started just doing a section at a time, by sanding and using a wire brush. Finally I just stripped the whole frame and painted it. Next I'll paint the swing arm and shock spring. The porting looks good. I asked for the longer smoother powerband. I also had a compression release installed for easier starting. I have one on my YZ465 and it makes it a ton easier to start on the trail. Picture of painted frame.

mudmantra is offline   Reply With Quote
Old 07-15-2014, 05:54 AM   #207
athomerecords25
Vintage YZ *****
 
Joined: Apr 2012
Location: Oakley, CA
Oddometer: 99
Thank you for the reply in regards to the Porting. I know that the WR500's only had Top End and the rest of the power range was flat. I wanted to know how the power range was improved, but I guess that answer will come in time.

What made you choose the Black frame color, instead of sticking with the stock white color?

Once again thank you for your reply.
athomerecords25 is offline   Reply With Quote
Old 08-04-2014, 10:51 PM   #208
mudmantra OP
Gnarly Adventurer
 
Joined: Jul 2009
Location: Humboldt
Oddometer: 335
It's the frame from my 1982 YZ490. Just about everything is cleaned and painted. Now I'm putting it back together.
mudmantra is offline   Reply With Quote
Old 09-22-2014, 03:44 PM   #209
NortwestRider
TRIPOD ADVENTURER !!
 
NortwestRider's Avatar
 
Joined: May 2008
Location: 3.7 miles North of Hell...SEATTLE....
Oddometer: 3,741
I'm dual sporting a 1983 IT490 right now and this thread has been great !!.


I know a lot about a few things,a little about a lot of things but I don't know everything about anything !!.
__________________
2012 Honda NC700XAR
1990 XT350 Overlander
GS500ADV..THE PURPLE EXPLORE
Facebook..PNW Adventure Riders..Facebook
MY BUILD http://www.advrider.com/forums/showthread.php?t=938440
NortwestRider is offline   Reply With Quote
Old 11-29-2014, 07:12 AM   #210
mudmantra OP
Gnarly Adventurer
 
Joined: Jul 2009
Location: Humboldt
Oddometer: 335
The 490 is back together. Now that the motor has been bored .5mm over, plus the porting and head mod. It's running rich and won't completely clear out. It's back to jetting again.
mudmantra is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
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 On

Forum Jump


Times are GMT -7.   It's 04:16 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014