[3rdgear]

I have read that it's possible to change the fork oil without removing the folks on some motorcycles. I want to drain about half of the oil and replace it with 20 weight. Is this possible with the Grom?

3rdGear

 

[THE TECH]

I was thinking that all you may need is a fluid extractor but I've yet to open the forks on this bike.

 

[Grom1202]

Are you that lazy that you can't unscrew few more bolts to remove the forks..... this job is so easy a monkey could do it lol...

braap

 

[3rdgear]

I went ahead and pulled the forks. Because you have to pump the folks in and out to actually get oil out, this would make it impossible without pulling the folks. After draining roughly 200 ml, I replaced with 220 ml of 20 weight fork oil.

A test ride tomorrow will determine if it was worth the effort.

3rdGear

 

[yallknowme]

Let me know how those seals hold up

 

[Karmatrade]

I went to the local bike shop here and they seriously had every weight but 20 wt. They even had 30wt! I will have to order some online. I am doing this just as a stop gap till I can save up for the race tech goodness.

Sent from my SCH-I535 using HondaGrom.net mobile app

 

[FXCLM5]

use 30 wt, im 155lbs and did 20 wt, now i wish i did 30 wt, but i ride my grom pretty hard

 

[3rdgear]

I agree. Go 30 wt., 20 is better but not enough.

 

[THE TECH]

Are there any special tools needed or do you just pull the forks and pump them until the fluid is out?

 

[Karmatrade]

I don't think there is any special tools. Just remember to losen the large top cap while the forks are tight in the triple tree. Then remove and drain. Work the legs back and forth to drain out the old oil. I have a graduated plastic container I'm going to drain it into that way ill know exactly how much I need to refill.
My hope is that the top cap has room where I can fab in a spacer between it and the spring stack to add about 8-10 mm of preload. Anything would be better than current. I hope to do this today so I'll update this evening.

Sent from my SCH-I535 using HondaGrom.net mobile app

 

[3rdgear]

Are there any special tools needed or do you just pull the forks and pump them until the fluid is out?

You will need a 36 mm socket for the top cap. Picked mine up at Sears for $9. Loosen and tighten top cap with forks on the bike.

Other than that, pull the forks. Very little oil will come out on its own. Each time you pump the fork, a little more will come out. You should get about 200-220 ml out if your take you time.

 

[Karmatrade]

Ok no special tools needed other than the 36mm socket. I did add 10mm in preload to the front. I suggest you loosen the small allen bolt inside the fork caps first then the caps themselves in the triple. Bought a bunch of 1/2 stainless washers and stacked on top of spring. 20wt feels better but still better RaceTech stuff is best. The added preload takes a bit of travel I think but the forks are more lively. Not a bad way to spend a couple hours while cranking some old school Front 242 and enjoying some Silver Bullets.

Sent from my SCH-I535 using HondaGrom.net mobile app