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 1330 -hydraulic valve actuators ?
assume i have hydr. lifters . never thought till now. 998's dont.
irv
2015 rts-white pearl- mods- '16 F3 fat 6 chrome wheels,
and some little stuff. setback utopia backrest, baja ron
sway bar, oem adj. air deflectors, marlin gps compass,
lamonster fbb foot pegs[modified brackets], lamonts
vibration damper, rock guard, and side case stiffener kit,
. brp comfort seat. , fomozas and
altimax, magic mirror mts, and wide mirrors.
[joyce & irvin toms]
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Very Active Member
 Originally Posted by Joyce47
assume i have hydr. lifters . never thought till now. 998's dont.
irv
Not sure how they work. They may be a disk system here by the looks for them.
valve assy.jpg
I could find nothing else but these in the breakdown. It looks like the black part is what makes contact with the cams.
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Hydraulic lifters was one of the promoted features of the 1330 engine. Never have to shim the valves again.
2018 F3 LIMITED
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They say hydraulic, but darned if I can see how they did it.
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VALVE ADJUSTMENTS
Originally Posted by Bob Denman
...Not that the 998s seemed to need much adjusting... 
I know a rider with over 123,000 miles on his GS: no adjustments! 
. But how many owners got NERVOUS un-necessarily and had them checked at 14,000 & 28,000 etc and PAID $ 600.00 + ( hoping the Stealer actually did it ?????? )...........jmho........Mike
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Very Active Member
Hydraulic Lash Adjusters
Hydraulic lash adjusters are used on double overhead cam engines instead of lifters because of the cramped space in the cylinder head. The 1998 Honda Nighthawk 750 I once owned had them. They are nothing new and beat the heck out of bucket shims.
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Originally Posted by den1953
Hydraulic lash adjusters are used on double overhead cam engines instead of lifters because of the cramped space in the cylinder head. The 1998 Honda Nighthawk 750 I once owned had them. They are nothing new and beat the heck out of bucket shims.
had a 650 nighthawk. bulletproof. great bike.
2015 rts-white pearl- mods- '16 F3 fat 6 chrome wheels,
and some little stuff. setback utopia backrest, baja ron
sway bar, oem adj. air deflectors, marlin gps compass,
lamonster fbb foot pegs[modified brackets], lamonts
vibration damper, rock guard, and side case stiffener kit,
. brp comfort seat. , fomozas and
altimax, magic mirror mts, and wide mirrors.
[joyce & irvin toms]
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Very Active Member
Originally Posted by Doc Humphreys
They say hydraulic, but darned if I can see how they did it.
Not sure what you mean? The exploded view of parts in a previous post shows the internals of the hydraulic lifter. They are not any different than almost every modern car on the road today. Really simple tech.
2018 F3 LIMITED
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Very Active Member
Originally Posted by den1953
Hydraulic lash adjusters are used on double overhead cam engines instead of lifters because of the cramped space in the cylinder head. The 1998 Honda Nighthawk 750 I once owned had them. They are nothing new and beat the heck out of bucket shims.
Hydraulic lifters are not compatible with high revs. So the maximum rpm the engine is designed to rev at will most likely determine if a solid lifter or hydraulic lifter is used.
2018 F3 LIMITED
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As I look at the parts in the diagram Doc included, #9 is the lifter bucket that holds a small quantity of oil and #8 is the Cotter Valve that keeps the volume of oil in the lifter bucket. Not shown, I believe because of the detail of the drawing is the bore system in the buckets through which oil under pressure is pumped into the bucket but may be in the circumfrential groove in the outside of the bucket. If you blow up the drawing you can see six of twelve bores in the cyclinder head through which pressurized oil is pumped into the buckets. It is a truly simple system. Anyway, that's my story and I'm sticking to it. YMMV.
Artillery lends dignity to what would
otherwise be a vulgar brawl.
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Cognac 2014 RT-S
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Originally Posted by billybovine
Hydraulic lifters are not compatible with high revs. So the maximum rpm the engine is designed to rev at will most likely determine if a solid lifter or hydraulic lifter is used.
 8100 rpm, versus 9500 rpm for the 991 series engine.
(7500: if you're revving it up in neutral.)
Last edited by Bob Denman; 08-13-2016 at 06:34 AM.
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Originally Posted by JayBros
As I look at the parts in the diagram Doc included, #9 is the lifter bucket that holds a small quantity of oil and #8 is the Cotter Valve that keeps the volume of oil in the lifter bucket. Not shown, I believe because of the detail of the drawing is the bore system in the buckets through which oil under pressure is pumped into the bucket but may be in the circumfrential groove in the outside of the bucket. If you blow up the drawing you can see six of twelve bores in the cyclinder head through which pressurized oil is pumped into the buckets. It is a truly simple system. Anyway, that's my story and I'm sticking to it. YMMV.
They are usually grooved on the outside in the cages I have seen so that oil can be pumped into through the oil galleries. The name it has nothing in it about hydraulic. They are calling them: Valve Lifter Bucket Block.....
Expensive little buggers - $24. each and you need 12....
Valve Lifter Bucket Bloc
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I'm pretty sure that there are 998s out there that could use a bit of tinkering under the valve covers.
