harleysportster
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storm_00
harleysportster
would 440 gears work on my 340 LF an if so will it make it that much faster?
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harleysportster
- Posts: 2965
- Joined: Thu Jul 14, 2005 12:00 am
- Real Name: Pat Scott
- Location: Southeast Pa.
harleysportster
storm_00,
The 440 gears would bolt right up but the ratio is higher and the sled would be sluggish off the line. technically the mph would increase once you got it rolling, only if the clutches made a full upshift and the engine rpm increased to the governed speed. Just quessing, the difference is about 5 mph. I'll look for the formula I had to figure it out.
The 440 gears would bolt right up but the ratio is higher and the sled would be sluggish off the line. technically the mph would increase once you got it rolling, only if the clutches made a full upshift and the engine rpm increased to the governed speed. Just quessing, the difference is about 5 mph. I'll look for the formula I had to figure it out.
'76 440 cyclone
'76 440 liquifire
'78 440 Cyclone
'75 JDX8 (sold to a member here)
'78 Liquifire(CrossCountry Clone)
'80 Liquifire(sold)
'76 440 liquifire
'78 440 Cyclone
'75 JDX8 (sold to a member here)
'78 Liquifire(CrossCountry Clone)
'80 Liquifire(sold)
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storm_00
harleysportster
how bout doin a 50/50 split say like take one gear from the 340 an one from the 440 just a thought just lookin for differant combinations seein how I have the whole thing tore down I know the origional is the best way but always lookin for that one little thing to put it over the edge thanx for the help
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harleysportster
- Posts: 2965
- Joined: Thu Jul 14, 2005 12:00 am
- Real Name: Pat Scott
- Location: Southeast Pa.
harleysportster
Storm,
I like your spirit but not sure if practical.
The 340 gear combination=21 tooth/39 tooth: 1.86- 66 pitch chain
The 440 gear combination=24 tooth/40 tooth: 1.67- 68 pitch chain
The chain is sized for the gear combination.
One other thing to mention is the governed speed of the engine.
The 340 LF is 7000-7500 rpm
The 440 LF is 7275-7750 rpm.
You should not exceed the governed speed trying to get a higher mph.
There are differences in the primary clutch weights also which are matched for the hp output of the engine.
If you are trying to get the max out of the sled safely, install 440 jugs,pistons, rejet carbs,24/40 gears and use the correct primary clutch.
I like your spirit but not sure if practical.
The 340 gear combination=21 tooth/39 tooth: 1.86- 66 pitch chain
The 440 gear combination=24 tooth/40 tooth: 1.67- 68 pitch chain
The chain is sized for the gear combination.
One other thing to mention is the governed speed of the engine.
The 340 LF is 7000-7500 rpm
The 440 LF is 7275-7750 rpm.
You should not exceed the governed speed trying to get a higher mph.
There are differences in the primary clutch weights also which are matched for the hp output of the engine.
If you are trying to get the max out of the sled safely, install 440 jugs,pistons, rejet carbs,24/40 gears and use the correct primary clutch.
'76 440 cyclone
'76 440 liquifire
'78 440 Cyclone
'75 JDX8 (sold to a member here)
'78 Liquifire(CrossCountry Clone)
'80 Liquifire(sold)
'76 440 liquifire
'78 440 Cyclone
'75 JDX8 (sold to a member here)
'78 Liquifire(CrossCountry Clone)
'80 Liquifire(sold)
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storm_00
harleysportster
harleysportster
thanx for the replies,I am tryin not to reinvent the wheel but since I have gotten this sled I have learned so much its not even funny had a thought lastnight while sittin around an haven a few what if we put the jugs of a 500 cc l/c honda shadow on an of course we are talkin a major over haul on the lower end dobt it would work but damn it sure sounded like a fun project lmao
any how not sure what I am gonna do with it I pulled the old bearings out an put the new ones in but seein how I have it tore down this far I wanna make sure I can get another 30 yrs out of it as of now I am rebuilding the belly pan heat heat an more heat then pound out the dents lol well gotta go talk at ya later.
thanx for the replies,I am tryin not to reinvent the wheel but since I have gotten this sled I have learned so much its not even funny had a thought lastnight while sittin around an haven a few what if we put the jugs of a 500 cc l/c honda shadow on an of course we are talkin a major over haul on the lower end dobt it would work but damn it sure sounded like a fun project lmao
any how not sure what I am gonna do with it I pulled the old bearings out an put the new ones in but seein how I have it tore down this far I wanna make sure I can get another 30 yrs out of it as of now I am rebuilding the belly pan heat heat an more heat then pound out the dents lol well gotta go talk at ya later.