new +4 swingarm w/ round carrier

[Ducman]

I recently installed a new +4 swingarm with a round modquad axcel carrier. On my old +4 with the stock carrier, I ran a 14/40 combo. I tried to put the old chain (still had probably 30% life left) on the new swinger with a 14/42 combo and it just barely wouldnt' fit; too short. I figured what the hell, I may as well start off with a new chain anyway and one more link will fix the too short problem with plenty of room for adjustment. Well now the new chain with one more link fits but the adjustment is as far as it will go the other direction to tighten the chain. It is actually adjusted pretty tight with a little room for some stretch, but if it stretches very much it will be too loose with no room for adjustment.

 

Has anybody had this problem and know if I go to to a 43 tooth rear would this take up enough slack to give back some adjustment or will the difference be barely noticeable. If i go with a 13/39 combo will this solve the problem with adjustability and give the same gear ratio but with a higher chain speed?

 

Thanks, Zack

[NickisGod]

Im confused by your problem. i think what your asking is if anyone else has ever had a problem with the roundhouse adjustment. well i know im running the same combo and just recently put it on, with the exception of the gearing combo.

 

atm i have 14-39 and next week ill be running 12-39. when i put my carrier on i had to play with it alot to figgure out how long my chain need to be. what i did was take the carrier and set it to its longest position and measured my chain so that when my chain was stretch fully it was completly straight with no sag but it was at a reasonable tension. i bought a 120 link chain and had to chopped two links off.

 

considering you only added a link (115) to the orignal chain measurement (114) im confused how you even fitted it. well thats really not important but id say u either forgot to set your carriers maximum position first before you bought or cut your chain. theres a online calculator that figgures your chain length but it dosent allow you to add in gearing and roundhouse carriers. so your best bet is next time around you do alittle homework before you buy something, the chances are you arnt the first to make this mistake.

 

ps. i wouldnt modify your ratio to much. i did and lost alot at bottem end. if you cant get the slack out try one less link, if not i know bmx bikes use half links, dont quote me on this, but i think mx bikes also use these to get desired slack.

Edited September 6, 2008 by NickisGod