Impulse bought DF50RTX, mistake? - Page 2

Apopka Hawk · 12-20-2018, 06:04 PM

Quote:

Originally Posted by Weldangrind

That's a decent price for a new 125; are you saying it is not fully manual?
Here's the answer to your chain question: https://allmoto.ie/site/motorcycle-chain/

Cool, thank you! No I just meant the clutch lever setup would come with the used bike, and I would have to purchase aftermarket separately if I went new.

Tried to find a gearbox to change out the fluid, complete fail. Is there a chance the engine oil does it all in this setup? All the videos I see on the 139QMB have belt driven gearboxes in the rear, not chain drive, so I am a bit lost. I had to buy the one with a nonexistent owners manual.

Apopka Hawk · 12-21-2018, 11:55 AM

It is a wet clutch uses same oil as engine, I gotta go to Walmart and get some rotella with the JASO MA certification according to ryan_ott and 90GTVert over on 49ccscoot forum. The Pennzoil I put in it is no good. I'm going to take her around the block a few times anyhow, she had some boogers come out when I drained the shipping oil and the Pennzoil is supposedly good at cleaning.

Weldangrind · 12-21-2018, 12:48 PM

I think the 139QMB is a GY6 engine, which is what you'll find in scooters. Yours is more like a CT70, where (as you say) the engine oil and transmission oil are one. You won't need a manual; there's a ton of info on that style of motor.
I recommend Rotella 15W40. If that Pennzoil is not wet clutch rated, I wouldn't run it at all. You don't want to contaminate the clutch.

Apopka Hawk · 02-02-2019, 07:05 PM

Got her up to 50 downhill after putting a 17t on the front. Had a broken carbbgasket and a blown out o ring caused erratic idle and misfires possibly lean condition epoxied it up for now. She's legal and on the road after waiting forever for the paperwork got insurance 70 bucks @ progressive.

Apopka Hawk · 04-11-2019, 06:33 PM

So the head gasket blew out and I lost compression completely at 825 miles, pulled the top end found out it is a 110cc they sold me as a 50.

It is stamped 139QMB but the bore is 52 and the stroke is that or better making it 110cc or more. The night it failed I assumed the worst and bought a new 50cc 4up 139FMA motor from monster scooter parts. What are the chances I can swap the gears between the two cases? Would much rather a 4 up 110 and an auto 50 going forward.

12-21-2018, 12:48 PM	#18
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I think the 139QMB is a GY6 engine, which is what you'll find in scooters. Yours is more like a CT70, where (as you say) the engine oil and transmission oil are one. You won't need a manual; there's a ton of info on that style of motor. I recommend Rotella 15W40. If that Pennzoil is not wet clutch rated, I wouldn't run it at all. You don't want to contaminate the clutch. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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04-11-2019, 06:33 PM	#20
Apopka Hawk Join Date: Nov 2017 Posts: 15	Gearing compatible? So the head gasket blew out and I lost compression completely at 825 miles, pulled the top end found out it is a 110cc they sold me as a 50. It is stamped 139QMB but the bore is 52 and the stroke is that or better making it 110cc or more. The night it failed I assumed the worst and bought a new 50cc 4up 139FMA motor from monster scooter parts. What are the chances I can swap the gears between the two cases? Would much rather a 4 up 110 and an auto 50 going forward.
	0

12-21-2018, 11:55 AM	#17
Apopka Hawk Join Date: Nov 2017 Posts: 15	It is a wet clutch uses same oil as engine, I gotta go to Walmart and get some rotella with the JASO MA certification according to ryan_ott and 90GTVert over on 49ccscoot forum. The Pennzoil I put in it is no good. I'm going to take her around the block a few times anyhow, she had some boogers come out when I drained the shipping oil and the Pennzoil is supposedly good at cleaning.
	0

02-02-2019, 07:05 PM	#19
Apopka Hawk Join Date: Nov 2017 Posts: 15	Got her up to 50 downhill after putting a 17t on the front. Had a broken carbbgasket and a blown out o ring caused erratic idle and misfires possibly lean condition epoxied it up for now. She's legal and on the road after waiting forever for the paperwork got insurance 70 bucks @ progressive.
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