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Discussion Starter · #1 · (Edited)
I called Rex today and feeling a little better about things now that I understand the two piece riser a little better. When I checked the riser bolts( a few weeks ago at Bass Pro) and two of the three that were loose going up through the riser,I took them out,one at a time,lock tighted them and put them back in,one by one. Well that was WRONG! There is a sequence that has to be followed when doing that and it's as follows:
1) put the bow in a press and remove strings.
2)remove the forearm
3) remove the 3 screws from the bottom
4) Remove the 2 screws going through the side of the riser
5) Lock tight the two screws going through the side of the riser and just snug them up
6) Lock tight the 3 screws going up through the bottom and just snug them up.
7) Tighten the 2 screws in the side as tight as you can get them
Here is the part I didn't know!!!
8) Tighten the BACK screw first,then the middle one and finally the TOP screw last!
9) Go back to the first screw and re tighten again in the same sequence.
10) put the forearm back on

Apparently,this tunes the riser to sit properly and therefore eliminating the down force to a minimum,by raising the limbs and allowing the string to run more level with the rail. He explained it as like installing a scope as far as tightening those 3 screws in sequence a couple times and now it makes sense to me. Hopefully my press will be here by this weekend and I'm breaking it down and trying again.

Glad I finally broke down and called Rex,he is such a nice guy and told me if I have any problems to just send it in and they would take care of it!
 

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Nemesis 480 & DeathStalker 380, I live near Greensburg PA. I enjoy building custom strings
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Yes, I'm glad you called him. Rex will always go the extra mile to take care of you and his product. It's ashame there had to be so many people with attitudes over the Nemesis. I know he caught alot of flack over this.
 

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That explains why some bows were worse than others

Bryan and I are still moving forward on the part so we can completely take the down pressure out.

Rail-less won't work unless the string is completely off the bow
 

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Nemesis 480 & DeathStalker 380, I live near Greensburg PA. I enjoy building custom strings
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We will see wont we. Im sure it will help alot. With the string being pulled downward across the rail adds more tension on the string and serving. With some of that tension relieved some ?
 

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I called Rex today and feeling a little better about things now that I understand the two piece riser a little better. When I checked the riser bolts( a few weeks ago at Bass Pro) and two of the three that were loose going up through the riser,I took them out,one at a time,lock tighted them and put them back in,one by one. Well that was WRONG! There is a sequence that has to be followed when doing that and it's as follows:
1) put the bow in a press and remove strings.
2)remove the forearm
3) remove the 3 screws from the bottom
4) Remove the 2 screws going through the side of the riser
5) Lock tight the two screws going through the side of the riser and just snug them up
6) Lock tight the 3 screws going up through the bottom and just snug them up.
7) Tighten the 2 screws in the side as tight as you can get them
Here is the part I didn't know!!!
8) Tighten the BACK screw first,then the middle one and finally the TOP screw last!
9) Go back to the first screw and re tighten again in the same sequence.
10) put the forearm back on

Apparently,this tunes the riser to sit properly and therefore eliminating the down force to a minimum,by raising the limbs and allowing the string to run more level with the rail. He explained it as like installing a scope as far as tightening those 3 screws in sequence a couple times and now it makes sense to me. Hopefully my press will be here by this weekend and I'm breaking it down and trying again.

Glad I finally broke down and called Rex,he is such a nice guy and told me if I have any problems to just send it in and they would take care of it!
This makes sense to me !! sounds like some of them did not get tightened right from the get go .
I don't buy tuning the riser , there is a flat surface on the barrel and a flat surface on the riser if all 3 bolts are tight those 2 surfaces become one front to back , so what is there to tune ?
 

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Discussion Starter · #8 ·
This makes sense to me !! sounds like some of them did not get tightened right from the get go .
I don't buy tuning the riser , there is a flat surface on the barrel and a flat surface on the riser if all 3 bolts are tight those 2 surfaces become one front to back , so what is there to tune ?
Maybe where the two piece riser joins together? I don't know! I was told it matters what order the screws are tightened,so I'm going to try that.
 
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Discussion Starter · #10 ·
Only time will tell. Rex told you what to do the first time when the bow was at pro shop. Why didn't he have you tighten them in sequence when he told you to locktight them?
I have no idea. Maybe they figured it out recently because I didn't know that when I took it there. Rex said they would do it for me if I wanted,but i'd like to break it down myself ! What better way to know your bow than tear it apart? LOL If all else fails,I will send it in.....
 
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TN: so are you under the impression that this is what is causing the excessive down pressure? I am just wondering if that is going to fix it. I will end up sending mine in but mine has never been apart so if that is the fix it means mine would have been put together originally with the screws tightened in the wrong order.
 

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This makes sense to me !! sounds like some of them did not get tightened right from the get go .
I don't buy tuning the riser , there is a flat surface on the barrel and a flat surface on the riser if all 3 bolts are tight those 2 surfaces become one front to back , so what is there to tune ?
I think you can add adjustment to the bow so the down pressure is adjustable
 

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Short story on the Night Train riser , when i first started working with a machinist on this 2 inch narrower riser .
I sent him a stock riser and said make me one exactly like that but 2 inches narrower . We talked on the phone and went over a bunch of stuff and after 3 months i got a prototype in , i fit it to my vent 150 , bolted everything up and found there was way more string pressure on the barrel than what i wanted . Nothing changed on the rise of the riser from the mounting surface ,so what the heck !!!

I took it apart and put it in my mill and took another 1/16 of an inch off of the mounting surface of the riser , re chamfer'd it and bolted it up , what that did was raise the riser 1/16 of an inch higher , bingo i was right where i was with the stock riser as to string pressure on the barrel .
We had some other issues to work through getting this riser perfect and it took a full year to get cookie cuter risers .

I understand tightening sequence on the 2 piece riser but in the end the three bolts on the bottom when tight mate the riser up flat to the barrel , the two on the side pinch the 2 halves together and the 3 hold it tight to the barrel .
IMO not going to change the string pressure one bit . Unless it was not tight from the get go . It is what it is , straight from the machinist , to the anodizer , to the crossbow company , in volume !! Who is going to eat a mistake on 500 or more finished risers ?
 

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Discussion Starter · #16 ·
Rex told me that when they first released the earlier bows that the riser bolts weren't lock tighted and the riser bolts had come loose,creating a butterfly effect on the limbs,causing them to drop down and create more down pressure. Now all the recent bows are lock tighted when built, before sent out. My guess is when I took my screws out the first time(one by one) and didn't tighten them in the correct sequence,my limbs didn't change and I glued them in the same position as when they had come loose,if that makes sense. At this point,i'm not sure about anything,but I did want to try it myself and I was assured by Rex they will do what it takes to make it right,if I fail to!
 
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Guys I am not trying to be a butt about the modification I just don't want to start talking about what it is or how its suppose to work until it works as its suppose too. We may find it needs some type of modification so until its a proven design I am not going into what the modified parts are

Burky ole buddy if you will call me I will tell you what we are doing, it would be great to see what you think
 

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Short story on the Night Train riser , when i first started working with a machinist on this 2 inch narrower riser .
I sent him a stock riser and said make me one exactly like that but 2 inches narrower . We talked on the phone and went over a bunch of stuff and after 3 months i got a prototype in , i fit it to my vent 150 , bolted everything up and found there was way more string pressure on the barrel than what i wanted . Nothing changed on the rise of the riser from the mounting surface ,so what the heck !!!

I took it apart and put it in my mill and took another 1/16 of an inch off of the mounting surface of the riser , re chamfer'd it and bolted it up , what that did was raise the riser 1/16 of an inch higher , bingo i was right where i was with the stock riser as to string pressure on the barrel .
We had some other issues to work through getting this riser perfect and it took a full year to get cookie cuter risers .


I understand tightening sequence on the 2 piece riser but in the end the three bolts on the bottom when tight mate the riser up flat to the barrel , the two on the side pinch the 2 halves together and the 3 hold it tight to the barrel .
IMO not going to change the string pressure one bit . Unless it was not tight from the get go . It is what it is , straight from the machinist , to the anodizer , to the crossbow company , in volume !! Who is going to eat a mistake on 500 or more finished risers ?
For those of us that are not engineers and just want their Nemesis to work as a top shelf bow should without checking CBN everyday for a new fix, will that day ever come? Who will be responsible for the fix, buyer, seller, manufacturer???
 

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I called Rex today and feeling a little better about things now that I understand the two piece riser a little better. When I checked the riser bolts( a few weeks ago at Bass Pro) and two of the three that were loose going up through the riser,I took them out,one at a time,lock tighted them and put them back in,one by one. Well that was WRONG! There is a sequence that has to be followed when doing that and it's as follows:
1) put the bow in a press and remove strings.
2)remove the forearm
3) remove the 3 screws from the bottom
4) Remove the 2 screws going through the side of the riser
5) Lock tight the two screws going through the side of the riser and just snug them up
6) Lock tight the 3 screws going up through the bottom and just snug them up.
7) Tighten the 2 screws in the side as tight as you can get them
Here is the part I didn't know!!!
8) Tighten the BACK screw first,then the middle one and finally the TOP screw last!
9) Go back to the first screw and re tighten again in the same sequence.
10) put the forearm back on

Apparently,this tunes the riser to sit properly and therefore eliminating the down force to a minimum,by raising the limbs and allowing the string to run more level with the rail. He explained it as like installing a scope as far as tightening those 3 screws in sequence a couple times and now it makes sense to me. Hopefully my press will be here by this weekend and I'm breaking it down and trying again.

Glad I finally broke down and called Rex,he is such a nice guy and told me if I have any problems to just send it in and they would take care of it!
Hi Tnmtns,
I disassembled my Nemesis 480, the screws were well tightened ... then I tightened the screws as you suggested, but my rope pressure remained the same and the central serving was likewise redone after 50 shots .. .. I wonder if the solution is to put a small shim under the riser at the third front screw so that it makes the rope rise slightly from the rail? (sorry my english)
Thanks
 

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Discussion Starter · #20 ·
Hi Tnmtns,
I disassembled my Nemesis 480, the screws were well tightened ... then I tightened the screws as you suggested, but my rope pressure remained the same and the central serving was likewise redone after 50 shots .. .. I wonder if the solution is to put a small shim under the riser at the third front screw so that it makes the rope rise slightly from the rail? (sorry my english)
Thanks
I haven't done mine yet because my press was supposed to be here yesterday,but now the tracking says it will be Monday. I think shimming the front screw would drop the limbs even further down,creating more down pressure. The only way to raise the riser,I think,would be to remove material from either the bottom of the rail or the top of the riser where it makes contact with the barrel. If it comes to that,I won't be doing that myself! I think there are a few guys working on a fix so keep watching the forum to get the latest updates! Thanks for sharing your results.....
 
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