BuggyMasters.Com - An On Line Mini Buggy Forum and Go Kart Forum

Go Back   BuggyMasters.Com - An On Line Mini Buggy Forum and Go Kart Forum > Technical Discussions > 250cc and Above Engine Tech

250cc and Above Engine Tech Technical Discussion Forum for 250cc and up Engines

Reply
 
Thread Tools
  #1  
Old 02-10-2014, 08:20 AM
mb1134 mb1134 is offline
Contributor
 

Join Date: Nov 2012
Location: Ringgold, GA
Posts: 383
Default Repack muffler

I am currently using the FMF universal muffler on my setup. After installing it yesterday I noticed it was way to loud for my liking. From what I have read this muffler is a 2-stroke muffler. I was thinking about repacking it with a 4-stroke fmf kit. Will this lower the noise a bit? Notice any difference in the way it runs?
__________________
Trailmaster XRX 150
TK Variator and 1500 Spring
SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust

Hammerhead 250GTS
White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust
Reply With Quote
  #2  
Old 02-10-2014, 09:06 AM
x-bird's Avatar
x-bird x-bird is offline
Power User
 

Join Date: Oct 2011
Location: Penciltucky
Posts: 2,518
Default

you really won't know til you open it up. if it's fully packed between the core and shell, then a repack probably won't make much of a difference.
Reply With Quote
  #3  
Old 02-10-2014, 06:23 PM
Masteryota's Avatar
Masteryota Masteryota is offline
Senior Member
 

Join Date: Dec 2012
Location: North Florida
Posts: 1,155
Default

Did you buy the muffler new? If it was used, and the jetting was incorrect, as about 80% of 2 smokes are, then you might gain some noise reduction repacking it. They are notorious for getting caked in oil and soot and thus acting like a straight pipe.
__________________
ASE Master and Toyota Master Diagnostic Certified
Buggy Building Trainee

'04 Dazon Raider 150 'modded'
Reply With Quote
  #4  
Old 02-11-2014, 05:26 AM
mb1134 mb1134 is offline
Contributor
 

Join Date: Nov 2012
Location: Ringgold, GA
Posts: 383
Default

I had it on my gy6 but swapped it to my 250 after I bought the hammerhead exhaust. I am going to repack it. I did have a couple blown pistons on the gy6 and some blow by. Though the muffler doesn't have but maybe 6 hours of run time on it.
__________________
Trailmaster XRX 150
TK Variator and 1500 Spring
SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust

Hammerhead 250GTS
White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust
Reply With Quote
  #5  
Old 02-11-2014, 11:38 PM
Johnny 5's Avatar
Johnny 5 Johnny 5 is offline
Contributor
 

Join Date: Dec 2010
Location: so cal
Posts: 325
Default

I have the fmf universal muffler on both of our dunes and it was stupid loud with the 1 1/4 open tail pipe. So I used the tubing it came with to make a turn down tail pipe with a smaller 7/8 pipe inside the tail pipe to make some back pressure. Without back pressure the motor runs sloppy and power is down. The noise is livable with a helmet on but still loud for me. I also was thinking the same thing with the 4 stroke packing to reduce the nasty bark from the muffler. I will try to repack the muffler this weekend and get back with you on the results.
Reply With Quote
  #6  
Old 02-15-2014, 08:52 AM
mb1134 mb1134 is offline
Contributor
 

Join Date: Nov 2012
Location: Ringgold, GA
Posts: 383
Default

Let me know how it turns out. I may repack mine as the 4-stroke repack came in yesterday.
__________________
Trailmaster XRX 150
TK Variator and 1500 Spring
SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust

Hammerhead 250GTS
White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust
Reply With Quote
  #7  
Old 02-17-2014, 07:14 AM
mb1134 mb1134 is offline
Contributor
 

Join Date: Nov 2012
Location: Ringgold, GA
Posts: 383
Default

Well no luck on the repacking. I couldn't get the damned muffler apart. I tried knocking it forward toward the outlet, but it would only go so far. I cant remove the cover towards the inlet due to the muffler being welded onto the header.
__________________
Trailmaster XRX 150
TK Variator and 1500 Spring
SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust

Hammerhead 250GTS
White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust
Reply With Quote
  #8  
Old 02-17-2014, 09:35 AM
Johnny 5's Avatar
Johnny 5 Johnny 5 is offline
Contributor
 

Join Date: Dec 2010
Location: so cal
Posts: 325
Default

The inlet pipe has to be removed, the outlet is were the spark arrestor is. I tried to remove mine yester day and it is not budging but I will get it today. The one on my dirt bike was easier to remove. I was whacking the housing with a rubber mallet and no luck.

Did you remove the muffler from your buggy?
Reply With Quote
  #9  
Old 02-17-2014, 11:03 AM
mb1134 mb1134 is offline
Contributor
 

Join Date: Nov 2012
Location: Ringgold, GA
Posts: 383
Default

I took the muffler off of the buggy. But the muffler had to be welded onto the header as there is no way to keep it on there otherwise. I may have to hacksaw the sucker and get it rewelded.
__________________
Trailmaster XRX 150
TK Variator and 1500 Spring
SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust

Hammerhead 250GTS
White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust
Reply With Quote
  #10  
Old 02-17-2014, 10:21 PM
Johnny 5's Avatar
Johnny 5 Johnny 5 is offline
Contributor
 

Join Date: Dec 2010
Location: so cal
Posts: 325
Default

Cant you remove the header pipe with the muffler?
Reply With Quote
  #11  
Old 02-18-2014, 05:29 AM
mb1134 mb1134 is offline
Contributor
 

Join Date: Nov 2012
Location: Ringgold, GA
Posts: 383
Default

Yes, but I cut the pipe size down to make the muffler stick straight out the back of the buggy. It is angled on the 250 and you cant get the cover off the way it is. The header either needs cut so you can take the cover off of the inlet side, or the cover needs to come off the outlet side of the muffler.
__________________
Trailmaster XRX 150
TK Variator and 1500 Spring
SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust

Hammerhead 250GTS
White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:48 PM.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.