Danny3xd
Member
That's pretty exciting. Looking forward to hearing more on them.
Grubee 4g belt drive
- Thread starter abikerider
- Start date
cspaur13
Member
dose any1 have some info on the push tailer they have on the same link at the bottem of the page. looks pretty cool. liking the belt drive. hope it works as well as it looks,
thanks,
cody
thanks,
cody
jared8783
Member
I just looked at it and it looks interesting. I have just one question, and it may sound stupid but I'm a newb so give me some slack. Why would you want the belt drive vs the gear box? What is the difference? Pros and cons of each.
ocscully
Member
The reduction gearboxes offered with the various 4-stroke kits have been the source of many problem for the users of thse engines. The chinese 2-stroke motors have a primary reduction of 4.2:1 built into them. The 4-stroke motors have no built in reduction hence the gearbox. The Gearboxes have had problems with the noise level and their reliability. A belt drive primary reduction wether v-belt or metric timing belt offers a pretty much silent primary drivetrain. Also belts require no lubrication.
ocscully
D
duivendyk
Guest
A high speed chain running in the open air is subject to wear, needs to be protected from dirt and needs to be lubricated.Belts are less vulnerable,run silently but take up more room sideways and can stretch,so a belt tensioner may be needed or means provided to adjust the belt tension.A chain running in an oil bath lasts almost indefinitely,a quality belt has a long but more limited life.In open air the belt probably wins out.
Silvaire
Member
Timing Belt Drive:
PRO'S
1. Quiet
2. Needs no lubrication
3. Needs minimal adjustment
4. Long life when properly designed
CON'S
1. Greater initial cost than roller chain components
1. Difficult to source components (difficult for R&D)
Roller Chain Drive:
CON'S
1. Noisy
2. Needs more frequent adjustment than timing belt
3. Needs frequent lubrication and cleaning (or rapid wear will result)
4. Shorter life than timing belt in typical use
PRO'S
1. Low initial cost and easy sourcing
2. Easy to change ratios and center to center distance (great for experimenting)
V Belt Drive:
CON'S
1. Any slippage leads to rapid wear
2. Cannot tolerate accidental lubrication
3. Greater power loss than either timing belt or roller chain
PRO'S
1. Good for constant load applications, or when slight slippage at high torque might be beneficial (such as air compressors, automobile engine driven accessories or table saws)
2. Low cost, easily sourced components
3. Easy to change ratios
Gears:
PRO'S
1. Very long life (when properly designed and constantly lubricated)
2. Quiet (but only if the gears are of high quality, properly clearanced, and are of helical cut design)
CONS:
1. Very considerable cost and effort to source and engineer
2. Require precise machining and alignment and must be rigidly mounted in relation to other gears
3. Difficult to modify the geartrain once it's designed and manufactured
THESE ARE JUST MY OPINIONS!
PRO'S
1. Quiet
2. Needs no lubrication
3. Needs minimal adjustment
4. Long life when properly designed
CON'S
1. Greater initial cost than roller chain components
1. Difficult to source components (difficult for R&D)
Roller Chain Drive:
CON'S
1. Noisy
2. Needs more frequent adjustment than timing belt
3. Needs frequent lubrication and cleaning (or rapid wear will result)
4. Shorter life than timing belt in typical use
PRO'S
1. Low initial cost and easy sourcing
2. Easy to change ratios and center to center distance (great for experimenting)
V Belt Drive:
CON'S
1. Any slippage leads to rapid wear
2. Cannot tolerate accidental lubrication
3. Greater power loss than either timing belt or roller chain
PRO'S
1. Good for constant load applications, or when slight slippage at high torque might be beneficial (such as air compressors, automobile engine driven accessories or table saws)
2. Low cost, easily sourced components
3. Easy to change ratios
Gears:
PRO'S
1. Very long life (when properly designed and constantly lubricated)
2. Quiet (but only if the gears are of high quality, properly clearanced, and are of helical cut design)
CONS:
1. Very considerable cost and effort to source and engineer
2. Require precise machining and alignment and must be rigidly mounted in relation to other gears
3. Difficult to modify the geartrain once it's designed and manufactured
THESE ARE JUST MY OPINIONS!
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4g T-belt
About a week ago I was told they would be shipped at the end of May and would take about a month to get here. 50 to USA and 50 to Australia. That's for the transmision that works with the motor you see it featured on the web page with. The honda adapted drive system won't have a sample to test for 90 more days or so. So ya, probably late fall for a honda trani. Also the honda one won't have the same bearings on the clutch bell and shaft, so I'm told it may have a bushing, don't know why. The HS motor has the clutch built in to the motor houseing. Look at the parts page for the 4g and you will see the difference in clutch bell design. Honda will have the new 3 pole clutch just like the HS. Other than the clutch bell design, I think the rest will be the same. Have to wait and see. The video on youtube shows the torque it has with the 5 to 1 ratio and that may be with the 11 tooth. Put the 10 tooth on and hold on to your hat. Apparently Don designed it so a spanner wrench could be used to tighten the belt to go without a third belt tensioning wheel. I do see what you mean about the small area of contact with the front gear, a loose belt would maybe slip easy on that. Hopefully the belt is quality enough to not stretch too much. Hopefully it will be available alone without a kit, for everyone with a finished bike who just want's to upgrade the drive system.
I agree with Houghmade. I would take off the cover and go with the exposed look, much cooler.
About a week ago I was told they would be shipped at the end of May and would take about a month to get here. 50 to USA and 50 to Australia. That's for the transmision that works with the motor you see it featured on the web page with. The honda adapted drive system won't have a sample to test for 90 more days or so. So ya, probably late fall for a honda trani. Also the honda one won't have the same bearings on the clutch bell and shaft, so I'm told it may have a bushing, don't know why. The HS motor has the clutch built in to the motor houseing. Look at the parts page for the 4g and you will see the difference in clutch bell design. Honda will have the new 3 pole clutch just like the HS. Other than the clutch bell design, I think the rest will be the same. Have to wait and see. The video on youtube shows the torque it has with the 5 to 1 ratio and that may be with the 11 tooth. Put the 10 tooth on and hold on to your hat. Apparently Don designed it so a spanner wrench could be used to tighten the belt to go without a third belt tensioning wheel. I do see what you mean about the small area of contact with the front gear, a loose belt would maybe slip easy on that. Hopefully the belt is quality enough to not stretch too much. Hopefully it will be available alone without a kit, for everyone with a finished bike who just want's to upgrade the drive system.
I agree with Houghmade. I would take off the cover and go with the exposed look, much cooler.
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Danny3xd
Member
Awesome Glack. Thanks for the update.
Any one have a direct link to the youtube vid?
Any one have a direct link to the youtube vid?
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4g
Don't forget there will be a wet clutch available for the stage 3 soon. I think Jeremy from BD is suppose to be testing them with different oils to see how they work. He may have some feedback on if a significant amount of oil will help with sound or wear reduction. Although like Jeremy said, packed with enough greese dampens the sound some but we'll see if an oil bath at the point of where the gears mesh will reduce the sound even more or not.
Then with a 10 tooth non freewheel and a SBP shift kit and you'll be in good shape.
It's hard to decide what to do at points where there are so many new developements waiting to emerge. You don't want to invest more into one thing then replace it with another. I'm anxious to see all the new products available to the motorized bicycle enthusiast, and summer is short here in MN. At least I have my finished 4stroke stage 3 to tide me over.
Don't forget there will be a wet clutch available for the stage 3 soon. I think Jeremy from BD is suppose to be testing them with different oils to see how they work. He may have some feedback on if a significant amount of oil will help with sound or wear reduction. Although like Jeremy said, packed with enough greese dampens the sound some but we'll see if an oil bath at the point of where the gears mesh will reduce the sound even more or not.
Then with a 10 tooth non freewheel and a SBP shift kit and you'll be in good shape.
It's hard to decide what to do at points where there are so many new developements waiting to emerge. You don't want to invest more into one thing then replace it with another. I'm anxious to see all the new products available to the motorized bicycle enthusiast, and summer is short here in MN. At least I have my finished 4stroke stage 3 to tide me over.
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wildwestrider
Member
- Local time
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- Joined
- Apr 15, 2009
- Messages
- 73
running without the cover
I had the same thought........What kind of open cover would they have done on an early 1900s bike.......maybe just a perimiter band to keep loose clothing or your leg from rubbing up against the edge........a good project for you Hough-made.
I had the same thought........What kind of open cover would they have done on an early 1900s bike.......maybe just a perimiter band to keep loose clothing or your leg from rubbing up against the edge........a good project for you Hough-made.
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