chain adjustment hawk 250

[Frag2]

Originally Posted by Robert44

i just put 17 front sprocket on hawk and tightened rear wheel and now it does not spin freely. did i tighten to much? is my chain to tight? any help would be appreciated.
thanks!!

When I changed from 15t to 17 tooth on magician chain was to short had to get new chain. Bunch of things could be at play here to tight axle. Spacer missing Well other posts several considerations.

[Robert44]

did you have trouble putting sprocket cover back on? got mine on, but can't get it off.

[Frag2]

Originally Posted by Robert44

did you have trouble putting sprocket cover back on? got mine on, but can't get it off.

Ye its bitch to take off an on. lift left side next to engine an wiggle still a bit hard , Mine biggest sprocket can have 17t front {Magician}

[GronkFries]

Originally Posted by bloverby

Torque spec in the rps hawk owners manual is 65ft/lbs

CSC tt250 spec is 35ft/lbs

May as well throw the rps manual in the garbage really.......

Originally Posted by Megadan

I would guess missing sprocket side axle spacer at the swing arm, but let us also not forget that sometimes they goof up at the factory when installing the rear wheel bearings sometimes.

As far as tightening the axle itself, just make sure you don't go too tight. 35ft-lbs is all it takes.

Torque spec sighting - Nice guys!! The CB650 I ride is 50ish to 72 ft lbs max (To account for the pin and crown nut) and I try for around 60 which seems to work for me. My CBR1000F with a 18mm bolt is 93 lbs (I don't tighten it quite that much though, sue me lol).

I guessed a 12 or 13mm bolt which is 40 or 45 on a guideline sheet. But that does not take into account for fastener type, use of thread locking compounds, etc. Axle bolts need to have a recommended specification from the manufacturer.

I have not found any technical documents anywhere for anything, which is my biggest frustration. My search prowess is limited I guess. Now I read on this thread there is a manual for a motorcycle with "make you dead" inaccuracies. Ugh...

[bloverby]

Originally Posted by GronkFries

I have not found any technical documents anywhere for anything, which is my biggest frustration. My search prowess is limited I guess. Now I read on this thread there is a manual for a motorcycle with "make you dead" inaccuracies. Ugh...

Here is a link to the RPS Hawk 250 owners manual

http://therps.net/User%20Manual/Hawk...s%20Manual.pdf

[GronkFries]

Originally Posted by bloverby

Here is a link to the RPS Hawk 250 owners manual

http://therps.net/User%20Manual/Hawk...s%20Manual.pdf

Thank you, appreciate it. My manual for the TBR7 has fun facts and some usefulness, but this one is better. And it has torque specs, mine doesn't.

If anyone gets a new TBR7 and ends up with a revised manual that includes extra info, which it should, please let me know.

[Megadan]

Go ahead and tighten that rear axle bolt to 65ft-lbs. Be amazed at how your thin box steel swing arm deforms. I will stick to using the CSC torque specs on my Hawk. Several thousand miles of doing so without issue.

[JerryHawk250]

The manual is incorrect. 65ft/lbs. is too much for these bikes. I'll stick to the 35ft/lbs. I've been using since I've bought the bike.

[GronkFries]

Originally Posted by JerryHawk250

The manual is incorrect. 65ft/lbs. is too much for these bikes. I'll stick to the 35ft/lbs. I've been using since I've bought the bike.

I wonder if that much torque would deform the hub and also bearing seats in addition to bending the swingarm, or warp a wheel bearing assembly that wasn't hardened very well.

The 40 something lbs I went with at assembly seemed like a lot and the value came from a Honda service manual torque guidelines list. Still felt like a lot of force for a small bolt.

Common sense goes a long way, and unless someone has physically clicked the value on their wrench they will never know - I'm windbagging sorry but if someone actually set their torque wrench to 65 ft lbs and went that far, "damn that's too tight" should come out of their mouths.

[GronkFries]

Oh, and I know I'm annoying everyone but forgot to add that the value in that manual was almost certainly not converted from Newton Meters (Nm). Still a little on the tight side but much closer to general specifications for a 13mm thread diameter (47 ft lbs).