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| techtalk:ref:engmech02 [2022/12/05 15:42] – [Hammer Performance Billet Base Kit] ixl2relax | techtalk:ref:engmech02 [2024/01/14 20:53] (current) – hippysmack | ||
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| * [[techtalk: | * [[techtalk: | ||
| - | CP pistons is who makes the pistons for both NRHS and Hammer. ((NRHS Sales of the XLFORUM | + | CP pistons is who makes the pistons for both NRHS and Hammer. ((NRHS Sales of the XLFORUM |
| But they are not the same pistons as they each have them made to their own specs. \\ | But they are not the same pistons as they each have them made to their own specs. \\ | ||
| - | CP is a custom piston manufacturer like Ross and others. ((aswracing of the XLFORUM | + | CP is a custom piston manufacturer like Ross and others. ((aswracing of the XLFORUM |
| They have a standard line but they also make pistons to their customers' | They have a standard line but they also make pistons to their customers' | ||
| - | |CP piston from Hammerperf.com. Two wrist pin oilers \\ per side, plus a groove to spread it around. ((photo by aswracing of the XLFORUM | + | |CP piston from Hammerperf.com. Two wrist pin oilers \\ per side, plus a groove to spread it around. ((photo by aswracing of the XLFORUM |
| |{{: | |{{: | ||
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| These keep the wrist pin from coming out of the piston and scraping the cylinder walls. \\ | These keep the wrist pin from coming out of the piston and scraping the cylinder walls. \\ | ||
| - | Pins coming out of pistons is an enormously rare event. ((aswracing of the XLFORUM | + | Pins coming out of pistons is an enormously rare event. ((aswracing of the XLFORUM |
| However, if the retainers are not installed properly, they will come out. \\ | However, if the retainers are not installed properly, they will come out. \\ | ||
| CP, in previous years, had some issues with the manufacturing of the pistons. \\ | CP, in previous years, had some issues with the manufacturing of the pistons. \\ | ||
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| Below is a cylinder that had a wrist pin retainer come loose. \\ | Below is a cylinder that had a wrist pin retainer come loose. \\ | ||
| - | {{: | + | {{: |
| ===== Wrist Pin Lock Rings ===== | ===== Wrist Pin Lock Rings ===== | ||
| These circlips are used with wrist pins that have a chamfer on the ends. \\ | These circlips are used with wrist pins that have a chamfer on the ends. \\ | ||
| - | The theory is that the chamfered edge on the wrist pin should push the round circlip into its groove when pushing on it. ((norseXL of the XLFORUM | + | The theory is that the chamfered edge on the wrist pin should push the round circlip into its groove when pushing on it. ((norseXL of the XLFORUM |
| |{{: | |{{: | ||
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| Teflon or nylon buttons can be used instead of circlip retainers. \\ | Teflon or nylon buttons can be used instead of circlip retainers. \\ | ||
| However, the pistons have to be designed for their use. \\ | However, the pistons have to be designed for their use. \\ | ||
| - | |Nylon buttons take the place of the retainer rings. ((photo by fdny37 of the XLFORUM | + | |Nylon buttons take the place of the retainer rings. ((photo by fdny37 of the XLFORUM |
| |{{: | |{{: | ||
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| ====== Pushrod Tubes ====== | ====== Pushrod Tubes ====== | ||
| - | ===== Billet | + | ===== Pushrod Base Upgrade |
| For 1991-2003 Sportster and 1991-2002 Buell (except Blast):\\ | For 1991-2003 Sportster and 1991-2002 Buell (except Blast):\\ | ||
| The stock lower pushrod tube retainer on a 1991-2003 Sportster is a cheapo piece of pot metal that bends and distorts, causing leaks. | The stock lower pushrod tube retainer on a 1991-2003 Sportster is a cheapo piece of pot metal that bends and distorts, causing leaks. | ||
| - | ====== Hammer Performance Billet Base Kit ====== | + | ==== Hammer Performance Billet Base Kit ==== |
| * [[techtalk: | * [[techtalk: | ||
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| {{: | {{: | ||
| + | |||
| + | ==== Zippers Billet Base Kit ==== | ||
| + | |||
| + | Zipper' | ||
| + | |||
| + | The bases are available as standalone parts (with lower seals) or as kits that include new telescoping pushrod covers. | ||
| + | |||
| + | {{: | ||
| ====== Aftermarket Rocker Arms ====== | ====== Aftermarket Rocker Arms ====== | ||
| - | Roller rockers can't do anything __but__ help the valve train. ((mikeLI_77 of the XLFORUM | + | Roller rockers can't do anything __but__ help the valve train. ((mikeLI_77 of the XLFORUM |
| They can help extend the life of your valve guides and seals. \\ | They can help extend the life of your valve guides and seals. \\ | ||
| Take side to side pressure that a normal rocker tip can put on the push rod away. \\ | Take side to side pressure that a normal rocker tip can put on the push rod away. \\ | ||
| They may also make your top end more quiet also. \\ | They may also make your top end more quiet also. \\ | ||
| - | If you look at it the end if the stock rocker arm, it's like the tip of your finger. ((mikeLI_77 of the XLFORUM | + | If you look at it the end if the stock rocker arm, it's like the tip of your finger. ((mikeLI_77 of the XLFORUM |
| As the rocker is pushed down on your valve since it has a curve like your finger tip. \\ | As the rocker is pushed down on your valve since it has a curve like your finger tip. \\ | ||
| It is also putting some sideways pressure on the valve. \\ | It is also putting some sideways pressure on the valve. \\ | ||
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| (especiallly if you use heavy duty springs) | (especiallly if you use heavy duty springs) | ||
| \\ | \\ | ||
| - | Most use the beehive springs now so that's not as much of an issue. | + | Most use the beehive springs now so that's not as much of an issue. |
| - | | S&S Roller Rocker Arms ((photos by xkreedx of the XLFORUM | + | | S&S Roller Rocker Arms ((photos by xkreedx of the XLFORUM |
| |{{: | |{{: | ||
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| * 88-C9971: 04-06 XL 1200. *Also fits NRHS 1250 Kits. | * 88-C9971: 04-06 XL 1200. *Also fits NRHS 1250 Kits. | ||
| * 88-C9177: 07-up XL 1200. *Also fits NRHS 1250 Kits. | * 88-C9177: 07-up XL 1200. *Also fits NRHS 1250 Kits. | ||
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| James Gasket Kit (17032-91-MLS): | James Gasket Kit (17032-91-MLS): | ||
| {{: | {{: | ||
| + | |||
| ===== Head Gaskets ===== | ===== Head Gaskets ===== | ||
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| You just have to go slow and cautious not to cut into the gasket. \\ | You just have to go slow and cautious not to cut into the gasket. \\ | ||
| - | {{: | + | {{: |
| ==== Thickness ==== | ==== Thickness ==== | ||
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| | | ||
| - | | Cometic .040" MLS Gasket on 05 1200C ((photo by JohnK of the XLFORUM | + | | Cometic .040" MLS Gasket on 05 1200C ((photo by JohnK of the XLFORUM |
| |{{: | |{{: | ||
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| \\ | \\ | ||
| ==== Torque Procedure ==== | ==== Torque Procedure ==== | ||
| - | |||
| - | |||
| Do not use oil in the cap nuts. Only a very light ' | Do not use oil in the cap nuts. Only a very light ' | ||
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| All steps are done in sequence per head. \\ | All steps are done in sequence per head. \\ | ||
| If you don't follow this sequence while tightening, they can easily back out or warp the heads. \\ | If you don't follow this sequence while tightening, they can easily back out or warp the heads. \\ | ||
| - | It's also possible and it happens more than not, that; ((Hippysmack of the XLFORUM | + | It's also possible and it happens more than not, that; ((Hippysmack of the XLFORUM |
| You tighten numbers 1 and 2, then tighten 3 or 4 tighter than you did 1 and 2 and all of a sudden 1 and 2 are both loose. \\ | You tighten numbers 1 and 2, then tighten 3 or 4 tighter than you did 1 and 2 and all of a sudden 1 and 2 are both loose. \\ | ||
| This is not pulling the head down evenly. \\ | This is not pulling the head down evenly. \\ | ||
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| Torque Sequence: \\ | Torque Sequence: \\ | ||
| - | {{: | + | {{: |
| - | + | Sometimes the studs will stretch upon torque (especially too much torque). ((Hippysmack of the XLFORUM | |
| - | Sometimes the studs will stretch upon torque (especially too much torque). ((Hippysmack of the XLFORUM | + | |
| Be aware that the stud itself could stretch (or twist in the middle). The long studs are weak in the middle. \\ | Be aware that the stud itself could stretch (or twist in the middle). The long studs are weak in the middle. \\ | ||
| Any bolts that stretch must be replaced. \\ | Any bolts that stretch must be replaced. \\ | ||
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| In that case, you did not get to final torque on that bolt. \\ | In that case, you did not get to final torque on that bolt. \\ | ||
| - | When you reach the point in tightening any bolt that it wants to stop turning and the torque spikes, that is it. ((wedge of the XLFORUM | + | When you reach the point in tightening any bolt that it wants to stop turning and the torque spikes, that is it. ((wedge of the XLFORUM |
| That's the warning sign that from that point forward you are breaking something. The metal will tell you where it's limit is. \\ | That's the warning sign that from that point forward you are breaking something. The metal will tell you where it's limit is. \\ | ||
| - | You can also may a mark from each bolt to the head so you will be able to see if the bolts are unscrewing or pulling out. ((Bored now of the XLFORUM | + | You can also may a mark from each bolt to the head so you will be able to see if the bolts are unscrewing or pulling out. ((Bored now of the XLFORUM |
| **NOTE**: \\ | **NOTE**: \\ | ||
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| The torque specs for different type / manufacturers are listed below. \\ | The torque specs for different type / manufacturers are listed below. \\ | ||
| - | When using the MLS torque specs, you'll find they are not that different from the FSM. ((Hippysmack of the XLFORUM | + | When using the MLS torque specs, you'll find they are not that different from the FSM. ((Hippysmack of the XLFORUM |
| For instance: After you get to 9 ft/bs, it's about a quarter turn to 14, then about a quarter turn to 22 and so forth. \\ | For instance: After you get to 9 ft/bs, it's about a quarter turn to 14, then about a quarter turn to 22 and so forth. \\ | ||
| But using the actual values instead of counting turns gets a more even pull on all sides. It also allows you to feel when something isn't right. \\ | But using the actual values instead of counting turns gets a more even pull on all sides. It also allows you to feel when something isn't right. \\ | ||
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| * Step 6 (final pull): \\ Torque all bolts in sequence to 42 ft/lbs. | * Step 6 (final pull): \\ Torque all bolts in sequence to 42 ft/lbs. | ||
| - | {{: | + | {{: |
| - | ===== Base Gaskets ===== | + | |
| - | For comparison, OEM base gasket 16789-04 is .014" thick. ((rocketmangb of the XLFORUM http://xlforum.net/forums/showthread.php?t=2075731& | + | |
| + | ===== Base Gaskets ===== | ||
| + | For comparison, OEM base gasket 16789-04 is .014" thick. ((rocketmangb of the XLFORUM https:// | ||
| Cometic: | Cometic: | ||
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| Any of these are good for making a seal on the cylinder bases. \\ | Any of these are good for making a seal on the cylinder bases. \\ | ||
| If you run with no base gaskets, just remember to account for clearances from your cam / valve train (depends on what cams, valves, gaskets etc., installed). \\ | If you run with no base gaskets, just remember to account for clearances from your cam / valve train (depends on what cams, valves, gaskets etc., installed). \\ | ||
| - | Remember to subtract the compressed gasket thickness, if using OEM composites (about 20thou?), from your valve to piston clearance to avoid clearance issues. ((skixx55 of the XLFORUM | + | Remember to subtract the compressed gasket thickness, if using OEM composites (about 20thou?), from your valve to piston clearance to avoid clearance issues. ((skixx55 of the XLFORUM |
| It's best (and assumed) to clay the pistons anyway to check where you're at on clearancing. \\ | It's best (and assumed) to clay the pistons anyway to check where you're at on clearancing. \\ | ||
| - | + | ===== Links for Purchasing Gaskets ===== | |
| - | + | Click on the links below. \\ | |
| - | + | * ....[[http:// | |
| + | * ....[[http:// | ||
| \\ | \\ | ||
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| [[: | [[: | ||
| - | ===== Links for Purchasing Gaskets ===== | ||
| - | Click on the links below. \\ | ||
| - | * ....[[http:// | ||
| - | * ....[[http:// | ||
