Sophomore Rider
Currently Offline
Posts: 128
Likes: 9
Joined: Apr 3, 2013 9:41:03 GMT -5
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Safe RPM's
by: mrpalmetto - Mar 6, 2015 9:12:23 GMT -5
Post by mrpalmetto on Mar 6, 2015 9:12:23 GMT -5
What is the top SAFE RPM on a 150 gy6 with a 60mm big bore kit and matching big bore head with an A9 cam. Or better yet, what is the top revs you can run for short periods of time and feel good that your engine will get you home.
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Safe RPM's
by: geh3333 - Mar 6, 2015 10:34:34 GMT -5
via mobile
Post by geh3333 on Mar 6, 2015 10:34:34 GMT -5
What is the top SAFE RPM on a 150 gy6 with a 60mm big bore kit and matching big bore head with an A9 cam. Or better yet, what is the top revs you can run for short periods of time and feel good that your engine will get you home. You can go up 8000 rpms , but not for long periods.I run between 6-7k for longer periods and have around 17-18,000 miles on the engine. Running above 8000 rpms in my opinion is asking for problems , so up to 7k is fine even 7500 rpms can be tolerated for some time but as you reach 8000 rpms u will want to keep it limited. |
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Sophomore Rider
Currently Offline
Posts: 137
Likes: 24
Joined: Jul 6, 2013 21:27:28 GMT -5
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Safe RPM's
by: mopojo - Mar 6, 2015 10:58:33 GMT -5
Post by mopojo on Mar 6, 2015 10:58:33 GMT -5
I try to keep mine below 8000. Once in a while I find it wanting to ride close to 9000 and I let off a bit. Never confirmed actual RPM as just using the chino-meter.
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Post by JerryScript on Mar 6, 2015 15:40:25 GMT -5
The main danger from high RPMs is to the head assembly first, then the crank. I dropped a valve last year at high RPM (going downhill around 50mph), the rocker arm pushed through the valve retaining clip, and the valve dropped down into the cylinder leaving hash marks across my piston. Had to do a head change on the side of the road, and of course the new head used different rockers, so I had to go back to the shop to get the proper rockers before finally finishing the repair road side. Luckily no one wanted to steal a broken down scooter on the side of the road that day!
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Safe RPM's
by: rcq92130 - Mar 6, 2015 16:40:27 GMT -5
Post by rcq92130 on Mar 6, 2015 16:40:27 GMT -5
The main danger from high RPMs is to the head assembly first, then the crank. I dropped a valve last year at high RPM (going downhill around 50mph), the rocker arm pushed through the valve retaining clip, and the valve dropped down into the cylinder leaving hash marks across my piston. Had to do a head change on the side of the road, and of course the new head used different rockers, so I had to go back to the shop to get the proper rockers before finally finishing the repair road side. Luckily no one wanted to steal a broken down scooter on the side of the road that day! That was on your personal fav - the pink one?  |
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Safe RPM's
by: JerryScript - Mar 6, 2015 17:07:20 GMT -5
Post by JerryScript on Mar 6, 2015 17:07:20 GMT -5
The main danger from high RPMs is to the head assembly first, then the crank. I dropped a valve last year at high RPM (going downhill around 50mph), the rocker arm pushed through the valve retaining clip, and the valve dropped down into the cylinder leaving hash marks across my piston. Had to do a head change on the side of the road, and of course the new head used different rockers, so I had to go back to the shop to get the proper rockers before finally finishing the repair road side. Luckily no one wanted to steal a broken down scooter on the side of the road that day! That was on your personal fav - the pink one? No, that baby is electric, sling enough batteries together in series, and she would probably reach 30 before burning out the motor!  |
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Safe RPM's
by: rcq92130 - Mar 6, 2015 19:29:06 GMT -5
Post by rcq92130 on Mar 6, 2015 19:29:06 GMT -5
That was on your personal fav - the pink one? No, that baby is electric, sling enough batteries together in series, and she would probably reach 30 before burning out the motor! You could take the "Pink Puppy", turn it sideways and strap it on the rear of the Blue Bomber as a spare tire. BINGO! Never stranded again! |
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Safe RPM's
by: geh3333 - Mar 6, 2015 19:56:05 GMT -5
via mobile
Post by geh3333 on Mar 6, 2015 19:56:05 GMT -5
No, that baby is electric, sling enough batteries together in series, and she would probably reach 30 before burning out the motor! You could take the "Pink Puppy", turn it sideways and strap it on the rear of the Blue Bomber as a spare tire. BINGO! Never stranded again! Haaayyyy ! Why doesn't my scoot have a nickname ? |
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Safe RPM's
by: JerryScript - Mar 6, 2015 21:46:57 GMT -5
via mobile
Post by JerryScript on Mar 6, 2015 21:46:57 GMT -5
You could take the "Pink Puppy", turn it sideways and strap it on the rear of the Blue Bomber as a spare tire. BINGO! Never stranded again! Haaayyyy ! Why doesn't my scoot have a nickname ? That would be a sight to see! |
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