Apollo Sportrax 125 oil leak - what brand engine?

Orangetractormn · 05-01-2020, 09:39 AM

My kids have an Apollo Sportrax 125cc atv which leaks oil from the sight glass seal, clutch cover, and the two big bolts on the cylinder head. It’s not leaking a ton of oil but seems like it would be a few easy fixes with the right gaskets and seals. From searching online it appears its a Zongshen engine but I cannot find any markings on the engine which would identify it. Is it a Zongshen engine? And can I purchase any gasket kit for a 125cc engine and it will fit?

I found some that appear to fit at https://mytrailbuddystore.com/zongsh...gasketset.aspx

Thanks for the help!

Bruces · 05-01-2020, 10:35 AM

Look for the engine numbers on a pad next to the shifter

Orangetractormn · 05-01-2020, 12:38 PM

152FMI and below it between two stars is 17048675

Orangetractormn · 05-01-2020, 03:32 PM

Any ideas? With google searches I’m seeing both zongshen and loncin

Orangetractormn · 05-03-2020, 10:33 AM

So it would be leaking at the stator cover. Still trying to figure out engine manufacturer.

Al · 05-03-2020, 10:53 AM

I bought a pack of gaskets from Amazon that said it fit a 125cc engine. Worked like a charm I think they are the same. Look to see the bolt holes match up and you should be fine.

Wolfairious · 05-03-2020, 04:23 PM

I just picked up a New 2017 Sportrax, any idea where to get a rear sprocket? The inner diameter is 47mm. I can only find ones with 52mm but then it doesn't ride on the hub, only the bolts.

Bruces · 05-03-2020, 04:45 PM

Quote:

Originally Posted by Orangetractormn

152FMI and below it between two stars is 17048675

Member humanbeing on here knows the manufacturers ,but I am pretty sure it is not a zongshen because they have a z in the numbers .

Orangetractormn · 05-05-2020, 09:45 AM

I sent a message to humanbeing and am hoping for a reply.

Orangetractormn · 05-05-2020, 09:46 AM

Quote:

Originally Posted by Wolfairious

I just picked up a New 2017 Sportrax, any idea where to get a rear sprocket? The inner diameter is 47mm. I can only find ones with 52mm but then it doesn't ride on the hub, only the bolts.

Why are you looking at replacing it?

humanbeing · 05-05-2020, 10:06 AM

These 52.4mm cames in 2 varitey:
https://item.taobao.com/item.htm?id=608475382218 Zongshen, Lifan
https://item.taobao.com/item.htm?id=521606865936 Jialing, Loncin
Sight glass, case cover oil leaks can fixed easily using RTV seal maker IF u know how to applies it (don't clog the oil paths !!!) .

Orangetractormn · 05-05-2020, 11:51 PM

Thank you for the response humanbeing, I will be trying the rtv method. Any idea who the engine manufacturer is?

Wolfairious · 05-06-2020, 02:58 PM

Quote:

Originally Posted by Orangetractormn

Why are you looking at replacing it?

It has a hard time going up inclines from a stop, gotta get a running start. Mine came stock with 12 front and 37 rear sprockets. I just found BMI Karts has sprockets to fit. I ordered a 45T. My 10yr old doesn't need that much top end anyway. They were out of stock till I called. Then they corrected the website so I could order one. They are 48mm I guess. Kinda odd size. I bought the 52mm that is listed as fitting Apollo on some sites, but after I tore everything off I found it was too big.

Orangetractormn · 05-06-2020, 10:03 PM

I’ll keep that in mind for the future. My 7 and 6 year old don’t need it to go fast yet but I have noticed it’s pretty slow off the line. Please keep the forum updated with any mods you do in the future!

05-03-2020, 04:23 PM	#7
Wolfairious Join Date: Apr 2020 Location: Vermont Posts: 8	I just picked up a New 2017 Sportrax, any idea where to get a rear sprocket? The inner diameter is 47mm. I can only find ones with 52mm but then it doesn't ride on the hub, only the bolts. __________________ 2017 Apollo Sportrax 125 1996 Redcat MPX-50 (SOLD) 1986 Honda TRX200SX 1979 H-D FLH1200
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05-05-2020, 10:06 AM	#11
humanbeing Join Date: Mar 2008 Posts: 2,436	These 52.4mm cames in 2 varitey: https://item.taobao.com/item.htm?id=608475382218 Zongshen, Lifan https://item.taobao.com/item.htm?id=521606865936 Jialing, Loncin Sight glass, case cover oil leaks can fixed easily using RTV seal maker IF u know how to applies it (don't clog the oil paths !!!) . __________________
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05-01-2020, 10:35 AM	#2
Bruces Join Date: May 2018 Posts: 1,578	Look for the engine numbers on a pad next to the shifter
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05-01-2020, 12:38 PM	#3
Orangetractormn Join Date: May 2020 Posts: 8	152FMI and below it between two stars is 17048675
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05-01-2020, 03:32 PM	#4
Orangetractormn Join Date: May 2020 Posts: 8	Any ideas? With google searches I’m seeing both zongshen and loncin
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05-03-2020, 10:33 AM	#5
Orangetractormn Join Date: May 2020 Posts: 8	So it would be leaking at the stator cover. Still trying to figure out engine manufacturer.
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05-03-2020, 10:53 AM	#6
Al Join Date: Jun 2017 Posts: 73	I bought a pack of gaskets from Amazon that said it fit a 125cc engine. Worked like a charm I think they are the same. Look to see the bolt holes match up and you should be fine.
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05-05-2020, 09:45 AM	#9
Orangetractormn Join Date: May 2020 Posts: 8	I sent a message to humanbeing and am hoping for a reply.
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05-05-2020, 11:51 PM	#12
Orangetractormn Join Date: May 2020 Posts: 8	Thank you for the response humanbeing, I will be trying the rtv method. Any idea who the engine manufacturer is?
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05-06-2020, 10:03 PM	#14
Orangetractormn Join Date: May 2020 Posts: 8	I’ll keep that in mind for the future. My 7 and 6 year old don’t need it to go fast yet but I have noticed it’s pretty slow off the line. Please keep the forum updated with any mods you do in the future!
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