extended swing arm

[CPIBanshee04]

I do alot of sand riding at winchester bay, florence, and sand lake im considering buying a 4" extended swing arm so i dont wheely so much up tree shots but i also like jumping dunes will a 4" swing arm make it to hard to jump? also i just put a trinity stage 4 head on my stock motor it came with 16cc domes (not my fisrt choice in dome size bought it used) running about 190psi on 110 race gas is that to much compression for a stock engine with pipes and k&n's?

[2003LimitedBanshee]

I do alot of sand riding at winchester bay, florence, and sand lake im considering buying a 4" extended swing arm so i dont wheely so much up tree shots but i also like jumping dunes will a 4" swing arm make it to hard to jump? also i just put a trinity stage 4 head on my stock motor it came with 16cc domes (not my fisrt choice in dome size bought it used) running about 190psi on 110 race gas is that to much compression for a stock engine with pipes and k&n's?

 

It is of course going to change how the bike reacts in the air. But, as long as you stay away from the "Drag Style" swingers (usually oval or smaller diameter tubing for weight) you should be fine. It will make pulling wheelies a bit more difficult, or controlled depending on how you look at it. I've been running 190-192 psi in my bike for almost a year, on an unwelded (soon to be welded though!!) crank with no problems. Although the sand can create some pretty hard load, the cranks seem to hold a little longer with the higher compression due to the give that the sand provides. I wouldn't recommend it on an asphalt bike.

[MDS2106]

It is of course going to change how the bike reacts in the air. But, as long as you stay away from the "Drag Style" swingers (usually oval or smaller diameter tubing for weight) you should be fine. It will make pulling wheelies a bit more difficult, or controlled depending on how you look at it. I've been running 190-192 psi in my bike for almost a year, on an unwelded (soon to be welded though!!) crank with no problems. Although the sand can create some pretty hard load, the cranks seem to hold a little longer with the higher compression due to the give that the sand provides. I wouldn't recommend it on an asphalt bike.

 

 

I would say your compression guage is probably all fucked up because you are not going to get 190 compression with 20cc domes.Sorry but I had to throw the bullshit flag on that one

Edited February 3, 2007 by MDS2106

[2003LimitedBanshee]

I would say your compression guage is probably all fucked up because you are not going to get 190 compression with 20cc domes.Sorry but I had to throw the bullshit flag on that one

 

Well you're throwing the bull shit flag on my SNAP-ON compression gauge. You pay for the flight and I'll let you kick, test all you want. The simply fact is that it's on. At 2000' ft (my home) it kicks 170-175 in each cylinder day in and day out. Maybe if I was using some POS Harbor Freight crap like a lot of people do I would agree with you, but since I don't... I can post some pics of the readings if you'd like in short time?

[lowriderb]

20cc domes with 190psi of compression? have your jugs been decked and do you have port work.. that is pretty much the only way i could see that much compression with that size dome... unless your running a big bore set up then that may change the idea some..

 

on an unwelded crank you are asking alot, on a stock welded crank you are probably still asking alot out of the stock bearings, but they will hold for a little while as well..

 

 

 

to the original poster: a +4 arm should help you control when your bike comes up pretty easily if your bike wheelies redily all the time..

 

jumping with any swingarm could be dangerous, but like was said i would stay away from the lighter style arms.. round arms are the stronger of the styles..

[Animalman294]

You need to tell who ever you buy the arm from that you intend on jumping with it. If you haven't bought the swinger yet you should contact Loco, he makes swingers and they are pretty tough and the prices are good................. :thumbsup:

[moneybags]

Could somebody tell me where he said that he had 20cc domes. Cause if you look at what he said you would see that he has 16cc domes. ::

[2003LimitedBanshee]

Could somebody tell me where he said that he had 20cc domes. Cause if you look at what he said you would see that he has 16cc domes. ::

 

They're calling on my 20cc domes from my sig. No the jugs haven't been decked, but yes it is on a stock port. Plus, porting reduces compression in pretty much all porting styles, so porting wouldn't increase compression. Like I said, pay for the flight and you can kick it yourself, heck bring your own gauge if my Snap-On is too shitty for your likings. The only thing I haven't done is personally cc domes. So unless dlnoss engraved the wrong cc into the domes when I originally purchased the head/dome combo it has 20cc's.

Edited February 3, 2007 by 2003LimitedBanshee

[lowriderb]

They're calling on my 20cc domes from my sig. No the jugs haven't been decked, but yes it is on a stock port. Plus, porting reduces compression in pretty much all porting styles, so porting wouldn't increase compression. Like I said, pay for the flight and you can kick it yourself, heck bring your own gauge if my Snap-On is too shitty for your likings. The only thing I haven't done is personally cc domes. So unless dlnoss engraved the wrong cc into the domes when I originally purchased the head/dome combo it has 20cc's.

 

 

 

i know that port work will lower the compression, misnumbering the domes is a very sleight possibility but i doubt it.. decking the cylinders or having no port work would be the only way i could see that much compression with the domes you say you have.. even then i would question it.. have you tried more than just the one compression tester, no matter the brand you have it could be out of calibration.. the dealer could have dropped it ect.. ect.. if your willing to pay me for my time then ill be happy to show up to check the compression on your bike..

 

also i wouldnt recommend going with that high of compression with a bone stock crank, they are known to come apart even after trueing and welding it i would think your on borrowed time with it because of the stock lower rod bearings and outer bearings..

 

 

 

also i forgot to mention, with the swing arms, if you want to change arms you aught to think about swaping over to a round housing carrier as well, it makes it easier to adjust your chain when you need to..