The Montesa Cota 315 R Thread... - Page 10

BikePilot · 10-06-2011, 05:43 PM

I don't know what's causing it, but your comment that flooding caused it to rev to the moon doesn't quite fit. Flooding should make most any engine, especially a two stroke bog down and certainly won't make it rev out as you describe. If more fuel makes it rev way high, then your engine speed is being controlled by restricing fuel flow without similarly restricting air flow (sorta like on a diesel) so, like a diesel, it'll rev up with more fuel, but no more air. If its running as it should more fuell will be too much and it'll bog.

Note that most two strokes when dead cold will rev up higher with more fuel as when totally cold even full choke isn't enough to get a totally sufficient amount of fuel into the combustion chamber - that condition should last only maybe 30 seconds. For example, when I start my cold 315R with full choke it fires right up and idles about right, after just a few seconds the idle will climb and if I don't push the choke down it'll start to rev up higher than I'd like on a cold motor. Now of course after its warmed for say a minute pulling the choke would bog down the motor.

The choke is sorta weird on these, make sure you are operating the choke lever correctly. Sounds dumb, but I don't know that I'd have figured it out right away if the seller hadn't show me how it worked

Spacemonkeyr · 10-06-2011, 07:27 PM

"It first started revving wildly when it was flooding because of the bad float." - Meaning, it was flooding because of the bad float, but yet the first wild revving was experienced while it still had the bad float, before I ever took the carb apart. Make more sense? Doesn't really to me because the only erratic revving I've ever had on a 2-stroke was right before they ran out of gas. And at that, they only revved up somewhat and then died. Never like this thing is doing. Never had a bad float, or flooding condition, where it didn't just fall on it's face and die out, 2 or 4 stroke.

Choke operation- Push it up and start it, wait 10-15 seconds when the idle changes, pull it back down and crack the throttle a couple of times to clear it, then should idle fine there after?

ridenm · 10-07-2011, 10:40 AM

Quote:

Originally Posted by Spacemonkeyr

Choke operation- Push it up and start it, wait 10-15 seconds when the idle changes, pull it back down and crack the throttle a couple of times to clear it, then should idle fine there after?

On my 315R the choke has sometimes hung up even though the lever is in the down position. Pushing it back up and then making sure it snaps back down fixes the occurrence. But that wouldn't create the wild over-rev problem.

BikePilot · 10-07-2011, 10:46 AM

Yep, just make sure you are moving the lever enough. When up it goes near vertical, when down it should be horizontal. Still, that's not the problem, the problem is way too much air getting into the engine I think. Severe over-heating can also make a two stroke rev away like that (but it'll have no power - if you toss it in gear and put just a little load on one in this condition it'll die out).

Spacemonkeyr · 10-08-2011, 04:18 PM

I believe that she is cured! Seems to be running well. I found 2 more problems with the carb:
1. The float arm would drop so low that sometimes it would bind the main valve and not push it up to seat it. I bent the stop tab of the float arm so it wouldn't drop so low. It didn't really seem to be flooding after replacing the floats, but I would see some gas bubble in both the main air inlet tube and the vent tube. Now I do not see this happening.

2. The Slow Air Bleed that is under the Slow Jet was clogged. Tiny hole through it, and must have sucked something else in it that was left in the tank/ fuel line. After I cleaned the carb and replaced the floats the first time, It ran for 10 minutes or so until it started revving again. This time I sloshed the tank out and sprayed carb cleaner through the fuel line. If I have any more problems, I guess I'll have to squeeze in an inline fuel filter.

I ran the bike for probably half an hour today, and all seems well.

Now the challenge is finding a place near me to ride and putting in some time. I'm really not used to going so slow, but I see good times ahead

Thanks for all of the advice guys!

Sting32 · 10-09-2011, 08:49 AM

Quote:

Originally Posted by Spacemonkeyr

I believe that she is cured! Seems to be running well. I found 2 more problems with the carb:
1. The float arm would drop so low that sometimes it would bind the main valve and not push it up to seat it. I bent the stop tab of the float arm so it wouldn't drop so low. It didn't really seem to be flooding after replacing the floats, but I would see some gas bubble in both the main air inlet tube and the vent tube. Now I do not see this happening.

2. The Slow Air Bleed that is under the Slow Jet was clogged. Tiny hole through it, and must have sucked something else in it that was left in the tank/ fuel line. After I cleaned the carb and replaced the floats the first time, It ran for 10 minutes or so until it started revving again. This time I sloshed the tank out and sprayed carb cleaner through the fuel line. If I have any more problems, I guess I'll have to squeeze in an inline fuel filter.

I ran the bike for probably half an hour today, and all seems well.

Now the challenge is finding a place near me to ride and putting in some time. I'm really not used to going so slow, but I see good times ahead

Thanks for all of the advice guys!

I run inline filters even on th brand new '11 raga, piece of mind I guess.

Double H · 10-13-2011, 10:30 AM

In.

Scored this low hour 2001 yesterday.

Garthe · 10-13-2011, 03:05 PM

^^^^^^^^^^^^^^^^^^^^^^^^^^^

turnsleft · 10-16-2011, 08:59 PM

Quote:

Originally Posted by Double H

Back in.

Scored this low hour 2001 yesterday.

That's better.

SocalRider · 10-31-2011, 08:52 PM

I have been looking for a clean Montesa 315r. Does anyone know of one for sale. Prefer 2001-2004, the newer the better. Send me a PM with any information you may have. Thanks for the help.

Sting32 · 11-01-2011, 06:22 AM

Quote:

Originally Posted by SocalRider

I have been looking for a clean Montesa 315r. Does anyone know of one for sale. Prefer 2001-2004, the newer the better. Send me a PM with any information you may have. Thanks for the help.

Here's a good Craigslist searching TIP. Download firefox, install it, but you uncheck make default... (no matter what, IE is safer for general browsing).

Then goto http://www.crazedlist.org/index.cgi website, follow on site instructions to eliminate what they need you to do so the site works. Firefox is the only browser you can do this with, that I know of.

then pick all the cities you want to "hunt through" in ONE search. Carefull, too many sites and searches I guess Craigslist can ban your IP thinking you are attacking servers... I do all of colorado, nebraska, missouri, oklahoma and north end of texas without problem.

you might find some close to you?

dontlr · 11-01-2011, 06:40 AM

Or just use this and not jump through hoops

http://claz.org/classifieds.html?q=Montesa+trials+bike

Sting32 · 11-01-2011, 06:56 AM

Ya do it one time, works flawless though. Ill keep your link too though :}

Sent from my DROID3 using Tapatalk

pjm204 · 11-01-2011, 07:07 AM

www.searchtempest.com

One site searches all craigslists within a specified radius of your zip code...and sorry no 315r here but I'd love to buy one in the future

Sting32 · 11-01-2011, 08:00 AM

That's a kewl site too. I like mine because I can pick sweet spot to hunt like dallas texas minneapolis minnesota

Sent from my DROID3 using Tapatalk

10-06-2011, 05:43 PM	#136
BikePilot Beastly Adventurer Joined: Jul 2005 Location: Tampa Oddometer: 10,901	I don't know what's causing it, but your comment that flooding caused it to rev to the moon doesn't quite fit. Flooding should make most any engine, especially a two stroke bog down and certainly won't make it rev out as you describe. If more fuel makes it rev way high, then your engine speed is being controlled by restricing fuel flow without similarly restricting air flow (sorta like on a diesel) so, like a diesel, it'll rev up with more fuel, but no more air. If its running as it should more fuell will be too much and it'll bog. Note that most two strokes when dead cold will rev up higher with more fuel as when totally cold even full choke isn't enough to get a totally sufficient amount of fuel into the combustion chamber - that condition should last only maybe 30 seconds. For example, when I start my cold 315R with full choke it fires right up and idles about right, after just a few seconds the idle will climb and if I don't push the choke down it'll start to rev up higher than I'd like on a cold motor. Now of course after its warmed for say a minute pulling the choke would bog down the motor. The choke is sorta weird on these, make sure you are operating the choke lever correctly. Sounds dumb, but I don't know that I'd have figured it out right away if the seller hadn't show me how it worked __________________ '09 Buell XB12XT, TL1000S, H1F, M620, CR250R, DR250SE, XR650R, Cota 315R Summer 2009 Ride Report http://advrider.com/forums/showthrea...1509c&t=507038 Summer 2008 RR. http://www.advrider.com/forums/showthread.php?t=367703

10-07-2011, 10:46 AM	#139
BikePilot Beastly Adventurer Joined: Jul 2005 Location: Tampa Oddometer: 10,901	Yep, just make sure you are moving the lever enough. When up it goes near vertical, when down it should be horizontal. Still, that's not the problem, the problem is way too much air getting into the engine I think. Severe over-heating can also make a two stroke rev away like that (but it'll have no power - if you toss it in gear and put just a little load on one in this condition it'll die out). __________________ '09 Buell XB12XT, TL1000S, H1F, M620, CR250R, DR250SE, XR650R, Cota 315R Summer 2009 Ride Report http://advrider.com/forums/showthrea...1509c&t=507038 Summer 2008 RR. http://www.advrider.com/forums/showthread.php?t=367703

11-01-2011, 07:07 AM	#149
pjm204 Beastly Adventurer Joined: Jan 2010 Location: Philadelphia, PA Oddometer: 1,248	www.searchtempest.com One site searches all craigslists within a specified radius of your zip code...and sorry no 315r here but I'd love to buy one in the future __________________ Current bikes:2006 DL650, 2006 Ural Past bikes: XT225, TTR125, CRF50 1974 DT125,1970 TS250,1985 v45, 1989 zx600c, 1978 GS400x, 1999 GS500E, 2001 GS500E 2005 Z750s, 1977 GS400e, 1982 GS1100ez, 1997 GSX600, 2007 VFR800, 2003 KLR650, 2003 FJR1300, 2006 DL1000, 2000 KLR650, 1999 WR360, 2008 DL650, 2005 DR650,2008 EX650r, 1996 CR500, 1982 GS450T

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10-06-2011, 07:27 PM	#137
Spacemonkeyr n00b Joined: Sep 2011 Location: NC Oddometer: 7	"It first started revving wildly when it was flooding because of the bad float." - Meaning, it was flooding because of the bad float, but yet the first wild revving was experienced while it still had the bad float, before I ever took the carb apart. Make more sense? Doesn't really to me because the only erratic revving I've ever had on a 2-stroke was right before they ran out of gas. And at that, they only revved up somewhat and then died. Never like this thing is doing. Never had a bad float, or flooding condition, where it didn't just fall on it's face and die out, 2 or 4 stroke. Choke operation- Push it up and start it, wait 10-15 seconds when the idle changes, pull it back down and crack the throttle a couple of times to clear it, then should idle fine there after?

10-08-2011, 04:18 PM	#140
Spacemonkeyr n00b Joined: Sep 2011 Location: NC Oddometer: 7	I believe that she is cured! Seems to be running well. I found 2 more problems with the carb: 1. The float arm would drop so low that sometimes it would bind the main valve and not push it up to seat it. I bent the stop tab of the float arm so it wouldn't drop so low. It didn't really seem to be flooding after replacing the floats, but I would see some gas bubble in both the main air inlet tube and the vent tube. Now I do not see this happening. 2. The Slow Air Bleed that is under the Slow Jet was clogged. Tiny hole through it, and must have sucked something else in it that was left in the tank/ fuel line. After I cleaned the carb and replaced the floats the first time, It ran for 10 minutes or so until it started revving again. This time I sloshed the tank out and sprayed carb cleaner through the fuel line. If I have any more problems, I guess I'll have to squeeze in an inline fuel filter. I ran the bike for probably half an hour today, and all seems well. Now the challenge is finding a place near me to ride and putting in some time. I'm really not used to going so slow, but I see good times ahead Thanks for all of the advice guys!

10-13-2011, 10:30 AM	#142
Double H Hurricane Harry Joined: Dec 2010 Location: Seattle Oddometer: 868	In. Scored this low hour 2001 yesterday.

10-13-2011, 03:05 PM	#143
Garthe ^OP ROCKS ARE YOUR FRIENDS... Joined: Nov 2004 Location: USA Oddometer: 4,115	^^^^^^^^^^^^^^^^^^^^^^^^^^^

10-31-2011, 08:52 PM	#145
SocalRider n00b Joined: Oct 2011 Oddometer: 4	I have been looking for a clean Montesa 315r. Does anyone know of one for sale. Prefer 2001-2004, the newer the better. Send me a PM with any information you may have. Thanks for the help.

11-01-2011, 06:40 AM	#147
dontlr Mysterious Chatter Joined: Sep 2003 Location: Queen Creek AZ - Its a dry heat Oddometer: 2,132	Or just use this and not jump through hoops http://claz.org/classifieds.html?q=Montesa+trials+bike

11-01-2011, 06:56 AM	#148
Sting32 Trails Evangelist Joined: Oct 2009 Location: Minneapolis, Ks Oddometer: 965	Ya do it one time, works flawless though. Ill keep your link too though :} Sent from my DROID3 using Tapatalk

11-01-2011, 08:00 AM	#150
Sting32 Trails Evangelist Joined: Oct 2009 Location: Minneapolis, Ks Oddometer: 965	That's a kewl site too. I like mine because I can pick sweet spot to hunt like dallas texas minneapolis minnesota Sent from my DROID3 using Tapatalk