Apollo DB36 250 first ride?

KC89 · 05-05-2021, 08:32 PM

I just put together my Apollo DB-36 250, took it around my block at low rpms and when I came back parked it and shut it off it released pressure from the engine and blew off this little red rubber cap! Does anyone know what could have happened??

**JerryHawk250** · 05-06-2021, 07:46 AM

Welcome aboard! Any pictures of the red cap?

TxTaoRider · 05-06-2021, 09:17 AM

Welcome!
Yes please send a pic of the cap...and where it's supposed to be located.

KC89 · 05-07-2021, 12:15 PM

For some reason its not letting me post my pic. But it kinda looks like the rubber cap that came on my battery. My neighbor said if it’s running fine I really shouldn’t worry but he’s also not a mechanic lol! And yes it does run good but only on half choke��♂️

**JerryHawk250** · 05-07-2021, 02:13 PM

Quote:

Originally Posted by KC89

For some reason its not letting me post my pic. But it kinda looks like the rubber cap that came on my battery. My neighbor said if it’s running fine I really shouldn’t worry but he’s also not a mechanic lol! And yes it does run good but only on half choke��♂️

Picture files has to be less than 196kb in order to post. For some reason the files don't automatically reduce anymore. If you have to run it on half choke then you will need to install a larger jet. Stock the carbs come tune real lean.

KC89 · 05-07-2021, 04:39 PM

Awesome thank you! After you said that I did some research and a lot of people have just gotten a whole new carburetor because of the jetting problem. I keep seeing mikuni, is this a good upgrade? Or are there better ones?

**JerryHawk250** · 05-07-2021, 04:49 PM

Nothing wrong with the stock carb. I think most people just don't want to take the effort to slot the 3 taper proof screws on the bowl. It only takes a minute or two to slot them with a hacksaw or Dremel. There is no performance upgrade with the Mikuni.

Oltzer · 05-07-2021, 06:02 PM

I think the stock carb sucks not because of having to cut the tamper proof screws but because it uses this odd cold start pilot jet that no one has other than aliexpress and I’m still waiting after maybe 3 week’s and using that site has been horrible for me although the vm26 mikuni clone from eBay came promptly from China and I was able to order genuine jets for it. I also think in the case of the Brozz 250 it should come with a carb where they have the parts available necessary for tuning at that price point but it comes with the same carb as the cheaper bikes

KC89 · 05-07-2021, 09:59 PM

Oh gotcha good to know. What carburetor would be an upgrade?

Oltzer · 05-07-2021, 10:38 PM

You could watch this comparison for some smaller dirt bikes - a lot of people seem to choose the slightly larger versions of the two mentioned in the video for these 250s. (Vm26) or Pe28 or pe30. I don’t really know at what point you would see better performance out of a bigger carb unless you did a number of other mods.

My feeling for myself is to use a carb same size as stock just make sure it can be tuned well and the parts are accessible- the mikuni vm26 clone is popular because it’s around 30 bucks and uses normal mikuni jets that you get from a lot of places. There are also a lot of sources of information on tuning them too so it should be easier for someone if they never did it before.

05-05-2021, 08:32 PM	#1
KC89 Join Date: May 2021 Posts: 4	Apollo DB36 250 first ride? I just put together my Apollo DB-36 250, took it around my block at low rpms and when I came back parked it and shut it off it released pressure from the engine and blew off this little red rubber cap! Does anyone know what could have happened??
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05-06-2021, 07:46 AM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	Welcome aboard! Any pictures of the red cap? __________________ 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
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05-06-2021, 09:17 AM	#3
TxTaoRider Join Date: Oct 2020 Location: Flower Mound Texas Posts: 904	Welcome! Yes please send a pic of the cap...and where it's supposed to be located. __________________ 2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene"
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05-07-2021, 04:49 PM	#7
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	Nothing wrong with the stock carb. I think most people just don't want to take the effort to slot the 3 taper proof screws on the bowl. It only takes a minute or two to slot them with a hacksaw or Dremel. There is no performance upgrade with the Mikuni. __________________ 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
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05-07-2021, 06:02 PM	#8
Oltzer Join Date: Apr 2021 Location: Harrisburg Pennsylvania Posts: 13	I think the stock carb sucks not because of having to cut the tamper proof screws but because it uses this odd cold start pilot jet that no one has other than aliexpress and I’m still waiting after maybe 3 week’s and using that site has been horrible for me although the vm26 mikuni clone from eBay came promptly from China and I was able to order genuine jets for it. I also think in the case of the Brozz 250 it should come with a carb where they have the parts available necessary for tuning at that price point but it comes with the same carb as the cheaper bikes __________________ 2020 Brozz 250
	0

05-07-2021, 12:15 PM	#4
KC89 Join Date: May 2021 Posts: 4	For some reason its not letting me post my pic. But it kinda looks like the rubber cap that came on my battery. My neighbor said if it’s running fine I really shouldn’t worry but he’s also not a mechanic lol! And yes it does run good but only on half choke��♂️
	0

05-07-2021, 04:39 PM	#6
KC89 Join Date: May 2021 Posts: 4	Awesome thank you! After you said that I did some research and a lot of people have just gotten a whole new carburetor because of the jetting problem. I keep seeing mikuni, is this a good upgrade? Or are there better ones?
	0

05-07-2021, 09:59 PM	#9
KC89 Join Date: May 2021 Posts: 4	Oh gotcha good to know. What carburetor would be an upgrade?
	0

05-07-2021, 10:38 PM	#10
Oltzer Join Date: Apr 2021 Location: Harrisburg Pennsylvania Posts: 13	You could watch this comparison for some smaller dirt bikes - a lot of people seem to choose the slightly larger versions of the two mentioned in the video for these 250s. (Vm26) or Pe28 or pe30. I don’t really know at what point you would see better performance out of a bigger carb unless you did a number of other mods. My feeling for myself is to use a carb same size as stock just make sure it can be tuned well and the parts are accessible- the mikuni vm26 clone is popular because it’s around 30 bucks and uses normal mikuni jets that you get from a lot of places. There are also a lot of sources of information on tuning them too so it should be easier for someone if they never did it before. __________________ 2020 Brozz 250
	1