Serval Cat

[RobertR]

As soon as I get the funds Im going to get one. I watched them run it at sand fest and at the Hq ride the damn thing is nice for ppl who want to dune and sometimes race.

[Snopczynski]

Seeing the actual Durations of the Serval has now even further cemented my stance on the pipe, carb, and reed selection that needs to be run with it.

[XxMeltIcexX]

So needless to say I am stoked about getting this engine into a chassis and try it out.

 

In a yfz frame

[AKheathen]

jeff, are you looking at that in terms of time/area, or degrees rotation on the porting?

[Snopczynski]

jeff, are you looking at that in terms of time/area, or degrees rotation on the porting?

Port time area, same as his spec sheet. 186.8 Exhaust toal open, and 126.8 transfer total open.

[AKheathen]

that's in degrees rotation, not area.........stereotypically, that would be a nice, and somewhat broad mid-range job with some top, but the time/area of them puts it as being able to make peak over 10k. basically, looking like a stock cylinder capabilities (profile, not output) similar to 194+/ 136+ , but still possesses the low-end, if you follow what i'm saying

[jimj64]

I just received my Serval kit from Trinity yesterday. I have to say their service was exceptional. Less than a week from the day I ordered til they arrived at my door (I live In Canada so that's quick). For $1305 Cdn I received the cylinders/piston/coolant plugs/Stage IV head with domes/12 point nute and stud extenders.

 

The cylinder casting are cleaner than any OEM Yamaha or Suzuki castings I've seen and overall they look great. Between now and the weekend I'll be getting my garage organized (I have 3 projects on the go and it's a little crazy in thier). I plane to have the engine reassemble by the end of the weekend. I will be putting in a Trinity modded shift drum, a complete Hinson 8 plate bullet clutch assembly, new shift forks, all new bearings and seals, adjustable timing plate and some shiney pieces to top it off.

 

Now I just need to get all of my stuff from the powder coaters....

 

What is the best way to attach pics?

 

Jim

Edited October 27, 2010 by jimj64

[ltd.yfz]

I don't know if it's the best but i use photobucket

[donkeypuncher]

I just received my Serval kit from Trinity yesterday. I have to say their service was exceptional. Less than a week from the day I ordered til they arrived at my door (I live In Canada so that's quick). For $1305 Cdn I received the cylinders/piston/coolant plugs/Stage IV head with domes/12 point nute and stud extenders.

 

The cylinder casting are cleaner than any OEM Yamaha or Suzuki castings I've seen and overall they look great. Between now and the weekend I'll be getting my garage organized (I have 3 projects on the go and it's a little crazy in thier). I plane to have the engine reassemble by the end of the weekend. I will be putting in a Trinity modded shift drum, a complete Hinson 8 plate bullet clutch assembly, new shift forks, all new bearings and seals, adjustable timing plate and some shiney pieces to top it off.

 

Now I just need to get all of my stuff from the powder coaters....

 

What is the best way to attach pics?

 

Jim

 

 

 

you sure you bought a serval cub from trinity or did you buy a "cheetah" cub?

[trickedcarbine]

Man, it is so sick to see that our market is still providing fresh parts that WORK! No matter what your stance is on the best way to get the most overall tq/hp out of it, the new cylinder from calvin is absolutely killer. I understand that Calvin designed the cylinder to be the best suited to the "Majority" of the duner masses and that is understandable. It is just impossible to create a new cylinder every time someone finds a new riding style, and that is why it is imparitive that people on the customer end need to do the research on nailing their own combo. The way I see it, in a few more years it will be feasable to have a four stroke bottom end and an incredible top end charge, just let the fellas keep doing R&D and be patient. Not long till efi will be obtainable for every one in a box, and pipes will be even more precice then they already are.

 

I can see the debate as to what is the best theory on how to get the serval to really shine. The thing is with the research I got from known builders , the cp cylinders fall off on top with excess compression. Wich means finding the happy spot with minimal trade off of torque for peak horse power will be a task in it self. Then there is the task of testing the carbs to find a good medium. After some calls, I understand that these cylinders don't really pull the rpm's on big carbs, and the smaller carbs are really helping the overrev. So Snop, I think you are on to something. As for the pipes, who cares! Pick your pipe for YOUR riding. Every one knows that almost every bike will pull harder with a set of shearer in frames over a set of FMF's, but the actual bike's duty may be more suited for some fmf's or pc's. Me personally, the shearers make more power, but at the cost of bottom end as well as cylinder scuffing if ran constantly in their favored rpm range. So I personally choose Rocket, CPI, or Trinity's. Re gear the sprocket so the bike is in their power and they kill it for MY riding.Although Snop, what do you think those Trinity pipes would do on there or maybe the shearer 2 to 1 pipe.

 

Who knows, so many theories out there, but till they are tested, ran, and backed up in a repeatable result, they are just theories. I really don't think Andy has to defend his initial build either. What he did was prove just how much potential this cylinder has in it. Think about it. He practically cobbled some realatively dune friendly parts together and presto, a fairly sweet motor.

 

We need to have an engine masters challenge, but only banshee hq version. Take the M&M serval package and work your magic. Then 30 days later meet at a known dyno for best overall average HP/Tq. Load up and hit the dunes. Get a known rider with no ties to any shop to make five passes on all the bikes. Make a chassis rule so the only variable will be the motor. Say... stock chassis and shocks to keep cost down and a plus 6 swinger. Put the same paddles and biffs on and you would one helluva close competition.

Edited October 27, 2010 by trickedcarbine

[AKheathen]

no fair......i can't afford to run down to the dunes state side just to hit a specific dyno....

[Snopczynski]

no fair......i can't afford to run down to the dunes state side just to hit a specific dyno....

Quit whining!

[SandmanPNW]

So what's the verdict? What is the best setup?

[jimj64]

Better be a Serval, that's what I ordered. I posted pics in my album, I have to resize them to attach them to a post.

[crustydemon]

I think I'm going to get these as well. Had my mind set on doing a cub but I think these would suit my riding style better. I'm kind of on the same page as Jeff, I want to see what they will do on a low/mid setup . I have everything to set this up already so its worth a shot, I'd have to get different pipes if I went with the cub anyway so whatever happens I wont be out anything . I just think they will be a much more versatile cylinder that can be used for different riding environments by simply swapping out a few bolt on parts. No one will ever make a magic cylinder that will make awesome power everywhere you would ever want it but from what i'm seeing these should be damn good for me. I'd also like to think they'd make a hell of a good hillclimbing motor.