new bf750 owner...lots of questions!

JJB said:

Hi folks. I'm new here. Just aquired a mint used BF750 and as you can see I don't know much about these things. Sorry for the long post...any and all help/advice/knowledge is appreciated!

Background: 2005 BF750. All stock down to the original tires. About 300 hrs and 900 miles. I plan to do mostly mid speed trail riding. Very little to no heavy mudding or serious rock crawling. Plan on getting a set of terra or baja cross tires in stock (or maybe one inch larger(26in) size soon.

Engine:
Can you tell by listening if the valves need adjusting? I’m not sure if what I’m hearing is normal or not and do not have previous service records. I'm sure I'll get to them soon...just wondering if it needs to be immediately.

Cold natured starts and poor/sluggish throttle response until fully warmed up. I understand a twin might be cold natured, but this seems excessive. Tapping the throttle before full warm up does not inspire confidence that this thing is tuned correctly. However, once it is fully warmed up, it seems to run quite well.

Heat…damn this thing puts off a lot of heat and it’s only been mid 50’s during my warmest ride so far. What can I do to lessen this on my left leg and also the rear rack area? I see a piece of heat shield above the muffler area, but it’s not nearly long or wide enough. Is this factory and can I purchase and install more? Other options?


Trans/CVT/Belt:
When it’s good and warm the belt squeals ever so slightly when stopped and in gear. Does this mean the belt needs attention? Other than that everything seems normal. Accelerates great with no noticeable slipping or other issues.

Engine braking…geez coming from manual transmission sport bikes this thing seems excessive to say the least, and has to be part of the reason it drinks so much fuel. I have to stay in the throttle pretty good to maintain speed downhill! I couldn’t imagine ever wearing out a set of brakes. I’m trying to learn as much as I can about the different aftermarket clutch options. Is there a reliable way to lessen the engine braking?

General clutch tech...I see folks talking about changing springs and such. Won’t this hurt the top end? Going with the “nothing is free” approach here. What exactly does the VForceJohn clutch mod do and are clutch mods appropriate with stock machines? If the power is there to be had I will eventually purse bolt on mods (pipe/filter,etc)...how do mild mods like these factor into clutch performance/mods…ie does the clutch have to be beefed up handle additional power?

4x4 engagment...can this be done while moving? I hope so b/c I've done it several times. Seems it would not hurt anything as long as the speed is slow and the rear wheels are not spinning.

Thanks again!

Click to expand...

redlined said:

JJB said:

Hi folks. I'm new here. Just aquired a mint used BF750 and as you can see I don't know much about these things. Sorry for the long post...any and all help/advice/knowledge is appreciated!

Background: 2005 BF750. All stock down to the original tires. About 300 hrs and 900 miles. I plan to do mostly mid speed trail riding. Very little to no heavy mudding or serious rock crawling. Plan on getting a set of terra or baja cross tires in stock (or maybe one inch larger(26in) size soon.

Engine:
Can you tell by listening if the valves need adjusting? I’m not sure if what I’m hearing is normal or not and do not have previous service records. I'm sure I'll get to them soon...just wondering if it needs to be immediately.

Cold natured starts and poor/sluggish throttle response until fully warmed up. I understand a twin might be cold natured, but this seems excessive. Tapping the throttle before full warm up does not inspire confidence that this thing is tuned correctly. However, once it is fully warmed up, it seems to run quite well.

Heat…damn this thing puts off a lot of heat and it’s only been mid 50’s during my warmest ride so far. What can I do to lessen this on my left leg and also the rear rack area? I see a piece of heat shield above the muffler area, but it’s not nearly long or wide enough. Is this factory and can I purchase and install more? Other options?


Trans/CVT/Belt:
When it’s good and warm the belt squeals ever so slightly when stopped and in gear. Does this mean the belt needs attention? Other than that everything seems normal. Accelerates great with no noticeable slipping or other issues.

Engine braking…geez coming from manual transmission sport bikes this thing seems excessive to say the least, and has to be part of the reason it drinks so much fuel. I have to stay in the throttle pretty good to maintain speed downhill! I couldn’t imagine ever wearing out a set of brakes. I’m trying to learn as much as I can about the different aftermarket clutch options. Is there a reliable way to lessen the engine braking?

General clutch tech...I see folks talking about changing springs and such. Won’t this hurt the top end? Going with the “nothing is free” approach here. What exactly does the VForceJohn clutch mod do and are clutch mods appropriate with stock machines? If the power is there to be had I will eventually purse bolt on mods (pipe/filter,etc)...how do mild mods like these factor into clutch performance/mods…ie does the clutch have to be beefed up handle additional power?

4x4 engagment...can this be done while moving? I hope so b/c I've done it several times. Seems it would not hurt anything as long as the speed is slow and the rear wheels are not spinning.

Thanks again!

Click to expand...

Welcome!
Valves. Only true method is to check adjustment. Loose valves are happy valves, they tighten over time.
Hesitation. Can't comment, mine is Fuel injected. BUT...carb'ed motors generally will be lean until they warm up.
CVT. Mine has about 120 miles, and if left in gear idleing, will squeal very lightly.
Engine braking. Same here. Will throw you over the front if not careful. Can remove actuator if desired, but not recommended.
I'll leave the Clutch tech to the experts.
4x4 engagement. NEVER do it while moving, read everywhere it'll trash the front diff.

All of this is my humble opinion......happy motoring!!!

Click to expand...

JJB said:

redlined said:

JJB said:

Hi folks. I'm new here. Just aquired a mint used BF750 and as you can see I don't know much about these things. Sorry for the long post...any and all help/advice/knowledge is appreciated!

Background: 2005 BF750. All stock down to the original tires. About 300 hrs and 900 miles. I plan to do mostly mid speed trail riding. Very little to no heavy mudding or serious rock crawling. Plan on getting a set of terra or baja cross tires in stock (or maybe one inch larger(26in) size soon.

Engine:
Can you tell by listening if the valves need adjusting? I’m not sure if what I’m hearing is normal or not and do not have previous service records. I'm sure I'll get to them soon...just wondering if it needs to be immediately.

Cold natured starts and poor/sluggish throttle response until fully warmed up. I understand a twin might be cold natured, but this seems excessive. Tapping the throttle before full warm up does not inspire confidence that this thing is tuned correctly. However, once it is fully warmed up, it seems to run quite well.

Heat…damn this thing puts off a lot of heat and it’s only been mid 50’s during my warmest ride so far. What can I do to lessen this on my left leg and also the rear rack area? I see a piece of heat shield above the muffler area, but it’s not nearly long or wide enough. Is this factory and can I purchase and install more? Other options?


Trans/CVT/Belt:
When it’s good and warm the belt squeals ever so slightly when stopped and in gear. Does this mean the belt needs attention? Other than that everything seems normal. Accelerates great with no noticeable slipping or other issues.

Engine braking…geez coming from manual transmission sport bikes this thing seems excessive to say the least, and has to be part of the reason it drinks so much fuel. I have to stay in the throttle pretty good to maintain speed downhill! I couldn’t imagine ever wearing out a set of brakes. I’m trying to learn as much as I can about the different aftermarket clutch options. Is there a reliable way to lessen the engine braking?

General clutch tech...I see folks talking about changing springs and such. Won’t this hurt the top end? Going with the “nothing is free” approach here. What exactly does the VForceJohn clutch mod do and are clutch mods appropriate with stock machines? If the power is there to be had I will eventually purse bolt on mods (pipe/filter,etc)...how do mild mods like these factor into clutch performance/mods…ie does the clutch have to be beefed up handle additional power?

4x4 engagment...can this be done while moving? I hope so b/c I've done it several times. Seems it would not hurt anything as long as the speed is slow and the rear wheels are not spinning.

Thanks again!

Click to expand...

Welcome!
Valves. Only true method is to check adjustment. Loose valves are happy valves, they tighten over time.
Hesitation. Can't comment, mine is Fuel injected. BUT...carb'ed motors generally will be lean until they warm up.
CVT. Mine has about 120 miles, and if left in gear idleing, will squeal very lightly.
Engine braking. Same here. Will throw you over the front if not careful. Can remove actuator if desired, but not recommended.
I'll leave the Clutch tech to the experts.
4x4 engagement. NEVER do it while moving, read everywhere it'll trash the front diff.

All of this is my humble opinion......happy motoring!!!

Click to expand...

Does removing the actuator disable the engine brake altogether or only at slower speeds?

So that's one no and one yes on the 4x4 engagement....anyone wanna jump in and break the tie? I don't see how it could hurt since it has to be moving to actually engage anyway. Again...I'm talking slow speed, non-spinning, light throttle, non jacking around engagement.

Clutch experts...any advice?

Thanks!

Click to expand...

brutemike said:

JJB said:

redlined said:

Welcome!
Valves. Only true method is to check adjustment. Loose valves are happy valves, they tighten over time.
Hesitation. Can't comment, mine is Fuel injected. BUT...carb'ed motors generally will be lean until they warm up.
CVT. Mine has about 120 miles, and if left in gear idleing, will squeal very lightly.
Engine braking. Same here. Will throw you over the front if not careful. Can remove actuator if desired, but not recommended.
I'll leave the Clutch tech to the experts.
4x4 engagement. NEVER do it while moving, read everywhere it'll trash the front diff.

All of this is my humble opinion......happy motoring!!!

Click to expand...

Does removing the actuator disable the engine brake altogether or only at slower speeds?

So that's one no and one yes on the 4x4 engagement....anyone wanna jump in and break the tie? I don't see how it could hurt since it has to be moving to actually engage anyway. Again...I'm talking slow speed, non-spinning, light throttle, non jacking around engagement.

Clutch experts...any advice?

Thanks!

Click to expand...

never engage 4wheel while moveing trust me i know ive rebuilt my front diff a couple of times and its not designed for on the fly shifting.ur valves are fine just the sound of the big v twin mine does the same thing since day 1 and i got 2600 miles on it now. i would change ur secondary spring on ur clutch call EPI or check there web you also can check out DALTONS web site as for your engine brake you can take off the belt drive cover and remove the fork from inside the cover but you have to keep the motor on or your 2wd and 4wd lite blinks back and forth it is really easy i did it on mine but u will use your brakes alot more last but not least put in a plug and play module for your cold harted beast or a dynojet jet kit. hope i could help im kind of new to this web site just got my first computer

Click to expand...