Messages

1

Engine and Bottom End / More power?

« on: April 29, 2016, 12:05:39 AM »

Only if you are going to run it at full throttle for a few seconds at a time.  I would not worry about trying to get rid of the dark colored spark plug tip by changing heat ranges.  I would richen it up a couple of jets and put in a new 8 series plug if you are going to continue running it like you were in the video.  The new plug will stay white for a while if you run it hard and then it will eventually start getting some color after many runs up the hill.

Ok thanks Jerry for your knowledge. Did you get my message. I might of wrote it in the wrong messanger i think.

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2

Engine and Bottom End / More power?

« on: April 28, 2016, 06:55:04 PM »

Wow really good info. Should i go down to a 7 series plug?

3

Engine and Bottom End / More power?

« on: April 28, 2016, 08:05:27 AM »

i know its super hard to see.but from the bottom it goes grey to a small strip of white to gray then light tan to a dark brown on top..basically i am lean at WOT RIGHT?

4

Engine and Bottom End / More power?

« on: April 27, 2016, 09:09:48 PM »

Yeah were is your exhaust port set at ?


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Not sure. How do i go about finding out? Degree wheel? Or measuring the port height?

5

Engine and Bottom End / More power?

« on: April 27, 2016, 09:01:34 PM »

trxdan your R looks like it runs pretty hard judging from the video, for me theres no replacement for displacement , but you can get the best of out what you got with more porting , dome and ignition. maybe have jerry make you a pipe

It does run pretty hard fast350r..is it possible to get more porting out of it?

6

Engine and Bottom End / More power?

« on: April 27, 2016, 12:21:46 PM »

now that make sense about making more power now day. what do you recommend Jerry?

7

Engine and Bottom End / More power?

« on: April 27, 2016, 12:02:49 PM »

Fix the clutch before making any changes.  You cannot evaluate anything accurately with the clutch slipping.  

Pipes move off of the flange due to pressure and or vibration.  You cannot evaluate the optimum pipe pressure by watching the pipe move on the flange.  When the pipe moves on the flange it is due to insufficient spring tension and or the pipe being improperly mounted not too much back pressure.  

Adjusting pipe pressure is an experimental process that is best monitored and optimized by instrumentation and an experienced person using a dyno.  Optimum back pressure is not the same for all engines and pipes!

its been fixed Jerry, i put a new clutch kit in i not too long ago and has not slipped since.

8

Engine and Bottom End / More power?

« on: April 27, 2016, 11:49:34 AM »

trx11 and zeplins have been used on some fast 370 at the dunes drag strip successfully with no problems for over 20 years.

you're right etccb. maybe its just me thinking too much about this whole thing.

9

Engine and Bottom End / More power?

« on: April 27, 2016, 07:46:14 AM »

In the video it sounds like you are over-revving it on the last part of the hill.  I would take one to two teeth off of the rear sprocket and see if that will keep it running closer to your peak power.  I think that one tooth on the engine will be too big of a change

Advancing the timing will make it come into the power at a lower RPM but will usually make it not rev as high.  

Your run on the hill was about 7 seconds long.  On my dyno a TRX 11 CM becomes too restricted when the time at full throttle is more than about 3 seconds and making 60 HP or more.  Full throttle for 5 seconds or more at 55 plus HP the TRX 11 CM becomes too restricted by its stinger and silencer.

The out of frame TRX 11 pipe and silencer builds more back pressure and heat in a shorter time and lower power levels.

The power, pipe temperature and time at full throttle determines the optimum restriction for any given pipe.

In the video i hit 4th gear thats when the clutch was slipping making it sound like i was over revving it.

Would you recommend another pipe Jerry?
Yesterday i notice something about my pipe. When i rev it up the pipe moves like it has a lot of pressure being built up.do you get what im saying?.its mounted correctly and have good springs at the head pipe to cylinder.

10

Engine and Bottom End / More power?

« on: April 26, 2016, 01:53:15 PM »

Have you enlarged the stinger on the end of the TRX11???....I run almost exactly the same setup as you and it made a difference.....But I also run a CR ignition...

what did you do to enlarge it?

11

Engine and Bottom End / More power?

« on: April 26, 2016, 11:15:45 AM »

13 42. I just put a 14 up front i havnt tried it yet

12

Engine and Bottom End / More power?

« on: April 26, 2016, 10:56:36 AM »

https://youtu.be/hEGglOLvYi8

13

Engine and Bottom End / More power?

« on: April 26, 2016, 10:55:44 AM »

it doesn't feel like it's running out of fuel but if you stay in one gear too long and there's no power it seems to peek out until you shift to the next gear and it pulls hard again. So the shifts are coming on pretty quick. I'll post a video and you'll be able to hear my 250 over the banshee and you could hear how fast I go to the gears.

14

Engine and Bottom End / More power?

« on: April 26, 2016, 10:54:31 AM »

Is the TRX 11 pipe a center mount or out of frame silencer?  

Are you using it for 300 ft drags only or other types of riding where you are at wide open throttle for more that 5 seconds at a time?

center mount With silencer. Its a hill shooter its about a 5 second run. Start from first and end up in high 4th at the end of the hill.

15

Engine and Bottom End / More power?

« on: April 26, 2016, 08:39:17 AM »

i bought this motor from a guy it had low hours but he could not get it to run properly. when i got it, it would detonate a lot and blew quit a few head o rings before it finally had a light seizure and thats when i rebuilt it. but since then its ran great no more detonation/pinging or blowing orings.