Apollo RX250 running issues

starsire79 · 03-20-2017, 06:53 PM

Alright I have had issues getting this bike to run correctly since I got it new. I have a mikuni clone carb on it. Bike will start and run through a 1/4 throttle perfectly. but any more throttle after that and it will bog. Plug is coming out jet black. jets in the carb are 30 pilot and 95 main needle all the way leaned out. I am at 2700'. There is no air restriction I have tested that thoroughly. Also new or old plug still same issue. Changed the jets and bog is still there and I feel like I am getting too low in the main at this point and seems like I am having another issue than that?

So what else can I look at? I have changed carbs 3x and jets dozens of times with no change. Could the exhaust be clogged from running rich? stator bad? valves? I don't know where to go from here need some guidance. Like I said runs great at start and 1/4 throttle but bad after that.

starsire79 · 03-20-2017, 07:16 PM

Just an update. I tested the battery and it was at 12.5v no load and 14 running so I think that eliminates anything electrical.

BlackBike · 03-21-2017, 08:37 PM

And you have clean fuel from the cap down,

fuel line ok?

The carb is clean and trash free? Checked for air leaks? Before and after carb?

**JerryHawk250** · 03-21-2017, 09:08 PM

What carburetor do you have? Does it have the fuel enricher circuit? Is the slide mechanical or vacuum operated? If it has the fuel enricher circuit it may not be working and staying choked. If it is a vacuum operated slide you may have a vacuum leak or slide is stuck in the close position and is flooding it out. If you have a manual choke check to make sure its in the open position.

starsire79 · 03-22-2017, 09:46 PM

its the mikuni vm28 clone. manual and yeah tested it every which way. adjusted the valves they were tight but didn't get rid of the rich issue. I think it might be a bad carb...seems to just be flooding with gas no matter the jetting sizes so gonna order a new one and see if there is a difference.

pete · 03-23-2017, 02:27 AM

have a look at the float level...

**JerryHawk250** · 03-23-2017, 08:08 AM

Quote:

Originally Posted by pete

have a look at the float level...

I'm with Pete. That was my next suggestion.

starsire79 · 03-27-2017, 07:58 PM

not sure what it was but put in a new carb and it runs great now... so who knows I don't think it was the float level but I dont know either new one works so gonna roll with that.

03-20-2017, 06:53 PM	#1
starsire79 Join Date: Aug 2016 Posts: 54	Apollo RX250 running issues Alright I have had issues getting this bike to run correctly since I got it new. I have a mikuni clone carb on it. Bike will start and run through a 1/4 throttle perfectly. but any more throttle after that and it will bog. Plug is coming out jet black. jets in the carb are 30 pilot and 95 main needle all the way leaned out. I am at 2700'. There is no air restriction I have tested that thoroughly. Also new or old plug still same issue. Changed the jets and bog is still there and I feel like I am getting too low in the main at this point and seems like I am having another issue than that? So what else can I look at? I have changed carbs 3x and jets dozens of times with no change. Could the exhaust be clogged from running rich? stator bad? valves? I don't know where to go from here need some guidance. Like I said runs great at start and 1/4 throttle but bad after that.
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03-21-2017, 08:37 PM	#3
BlackBike Join Date: Feb 2016 Location: George West, Texas Posts: 4,097	And you have clean fuel from the cap down, fuel line ok? The carb is clean and trash free? Checked for air leaks? Before and after carb? __________________ ***************************************** 2015 Bashan"Blaze" BS250GY-31 (DB-07K-250) GONE 2017 Suzuki V Strom 650 XT "We are all born ignorant, but one must work hard to remain stupid." ~Benjamin Franklin~
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03-21-2017, 09:08 PM	#4
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,516	What carburetor do you have? Does it have the fuel enricher circuit? Is the slide mechanical or vacuum operated? If it has the fuel enricher circuit it may not be working and staying choked. If it is a vacuum operated slide you may have a vacuum leak or slide is stuck in the close position and is flooding it out. If you have a manual choke check to make sure its in the open position. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel Last edited by JerryHawk250; 03-22-2017 at 02:42 PM.
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03-23-2017, 02:27 AM	#6
pete Join Date: Jan 2012 Location: ChCh , NZ Posts: 2,261	have a look at the float level... __________________ 09 XT660R ... 06 TTR250 ... 80 Montesa H6 125 Enduro... 77 Montesa Cota 348 MRR "Malcom Rathnell Replica"... Current resto projects.. 81 Honda CT110... 80 Kawasaki KL250A1... 11 Husaburg TE125 enduro... "sold" along with another 31... Lifan 125 Pitbike.. "stolen" ... KIWI BIKER FORUM...... http://www.kiwibiker.co.nz/forums/content.php All the best offroad rides in NZ... http://www.remotemoto.com/ E-mail... xtpete1@gmail.com
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03-20-2017, 07:16 PM	#2
starsire79 Join Date: Aug 2016 Posts: 54	Just an update. I tested the battery and it was at 12.5v no load and 14 running so I think that eliminates anything electrical.
	0

03-22-2017, 09:46 PM	#5
starsire79 Join Date: Aug 2016 Posts: 54	its the mikuni vm28 clone. manual and yeah tested it every which way. adjusted the valves they were tight but didn't get rid of the rich issue. I think it might be a bad carb...seems to just be flooding with gas no matter the jetting sizes so gonna order a new one and see if there is a difference.
	0

03-27-2017, 07:58 PM	#8
starsire79 Join Date: Aug 2016 Posts: 54	not sure what it was but put in a new carb and it runs great now... so who knows I don't think it was the float level but I dont know either new one works so gonna roll with that.
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